Skeletal Series Part 12: Human Teeth

28 Oct
teeeeeethhh

Basic human permanent dentition. Click to enlarge.  Image credit: modified from here.

Teeth, as a part of the dentition, are a wonder of the natural world and come in a variety of forms and designs in vertebrate animals, with perhaps some of the most impressive examples include the tusks of elephants and walruses.  They are also the only part of the human skeletal system that can be observed naturally and the only part that interact directly with their environment via mastication (White & Folkens 2005: 127).

Although primarily used to break down foodstuffs during mastication, teeth can also be used as tools for a variety of extramasticatory functions such as the processing of animal skins and cord production (Larsen 1997: 262).  As the hardest of the biological material found in the body teeth survive particularly well in both the archaeological and fossil records, often surviving where bones do not.  Teeth are a goldmine of information for the human osteologist and forensic anthropologist alike as they can be indicative of the sex, age, diet and geographic origin of the individual that they belong to (Koff 2004, Larsen 1997, Lewis 2009, White & Folkens 2005).

This entry will introduce the basic anatomy of the human dental arcade, deciduous and permanent dentition and the various tooth classes, alongside a quick discussion of the action of mastication itself.  But first, as always in this series, we’ll take a look at how teeth can be found during the excavation of archaeological sites.  This post marks the final Skeletal Series post to deal explicitly with individual elements of the human skeletal system.  The next few posts in the Skeletal Series will be aimed at detailing the methods used in aging and sexing elements in the adult and non-adult skeleton (and the success rates of the various methods), followed by posts introducing the pathological conditions that can be present on human skeletal remains.

Excavation

The 32 permanent human teeth, located in the upper arcade (maxilla) and lower arcade (mandible) of the jaws, each holding 16 teeth, are resilient to chemical and physical degradation.  Furthermore tooth crown morphology (the surface that consists of enamel) can only be changed by attrition (tooth wear), breakage, or demineralization once the crown of a tooth has erupted through the gum line (White & Folkens 2005: 127).  As such teeth are often found at locations where human remains are suspected to be buried or otherwise excavated.  Care must be taken around the fragile bones of the spanchnocranium (i.e. the facial area of the skull), defined as necessary, and, if needed due to fragility, the area may have to be lifted with natural material still adhered to the bone to be more carefully micro-excavated in the lab (Brothwell 1981: 3).

Circled in red, the teeth are located in the upper (maxilla) and lower (mandible) jaws. This individual, dating to the medieval period in eastern Germany, highlights a common occurrence in supine burials where the mandible often ‘falls’ forward as the muscles, ligaments and tendons decompose. Always be careful when excavating suspected burial features as both bone and tooth can be chipped by trowels or other metallic excavation implements. Photograph taken by author.

Loose dentition may be found around the skull itself as teeth can be loosened naturally postmortem as natural ligaments decompose.  Sieving around the location of the skull may prove useful in finding loose teeth and also the smaller bones of the skulls (such as the ear ossicles).  In the excavation of non-adult remains, or of suspected females with fetal remains in-situ, great care should be taken in recording and the excavating of the skull, torso and pelvis.  As mentioned below teeth form from the crown down, as such deciduous or permanent teeth during growth may be loose in exposed crypts in the mandible or maxilla (Brickley & McKinley 2004).  Furthermore due to the small size and colour of the 20 deciduous teeth, especially the crowns during the formation and growth of the teeth, may be mistaken for pieces of dirt or rocks.

Tooth Anatomy & Terminology

The basic anatomy of teeth can be found in the diagram below, but it is worth listing the anatomical features of a typical tooth here.  The chewing surface of the tooth is called the occlusal surface and it is here that the crown of the tooth can be found.  The crown of a tooth is made of enamel, an extremely hard and brittle mixture of minerals (around 95-96% hydroxyapatite).  The enamel is formed in the gum and once fully formed contains little organic material.  The demineralization of teeth can repair initial damage, however this is limited in nature.  Dentin (sometimes termed dentine) is the tissue that forms the core of the tooth itself.  It is supported by a vascular system in the pulp of the tooth.  Dentin can only repair itself on the inner surface (the walls of the pulp cavity), but dentin is a softer material than enamel and once exposed by occlusal wear it erodes faster than enamel.  The pulp chamber, in the centre of the diagram below, is the largest part of the pulp cavity at the crown end of the tooth.  The pulp itself is the soft tissue inside the pulp chamber, which includes the usual trio bundle of vein, artery and nerves (V.A.N.).  The root of the tooth is the part that anchors it into the dental alveolus tissue (sockets) of the jaw (either the maxilla or mandible).

Toothanatomy2

The basic anatomy of a tooth (in this case a molar), outlining the three main layers present in all human teeth. Image credit: Kidport.

Cementum is the bone type tissue that covers the external surface of the roots of teeth.  The apex, or apical foramen, is the opening at the end of each root, which allows for the nerve fibers and vessels up the root canal into the pulp chamber.  Heading back up to the occlusal surface of the tooth we encounter cusps of the crown, each of which have different individual names depending on their position.  Upper teeth end with the prefix -cone whereas lower teeth end with the prefix -conid (see details here).  Finally we have fissures, which are clefts between the occlusal surfaces between cusps.  Fissures help divide the cusps into patterns and are helpful to know to help identity individual teeth (specifically the molars).  Above information taken from White & Folkens (2005: 130-131).

As previously highlighted there are some directional terms that are specific to the dentition, but it is pertinent to repeat some of the key aspects here for clarification as tooth orientation is important -

Apical: towards the root.
Buccal: towards the cheek (the buccinator muscle- the terminator of the muscle world!), used in realtion to posterior teeth (premolars and molars) only.
Cervical: towards the base of the crown or neck of the tooth (often called the cementoenamel junction).
Distal (direction): away from the midline of the mouth, opposite of mesial.
Incisal: towards the cutting edge of the anterior teeth.
Interproximal: between adjacent teeth, also useful to know and be able to identify are interproximal contact facets (IPCFs) which can indicate anatomical location of  tooth.
Labial: surface towards the lips, anterior teeth (canines and incisors) only.
Lingual: of the tooth crown towards the tongue.
Mesial (direction): towards the midline, closest to the point where the central incisors contact each other.
Occlusal: towards the chewing surface (crown) of the tooth.

teethdirect

Tooth anatomical direction terminology and legend of tooth position, above is the maxillary dental arcade. Typically the uppercase and lowercase numbers refer to maxilla and mandible positions respectively, and often include a L or R for left or right hand side for quadrant location. In deciduous dentition lower case letters are used, in permanent dentition capitalization is used. Premolars are often 3rd (1st premolar) and 4th (2nd premolar) after palaeontological standards. Check out Brickley & McKinley (2004) below for BABAO recording standards. Image credit: Dr Lorraine Heidecker @ Redwoods.edu.

Above information taken from White & Folkens (2005: 128) and here.

A different method for recording the presence/absence and state of the individual teeth from archaeological skeletal populations is proposed by the British Association of Biological Anthropology and Osteoarchaeology (BABAO) as mentioned above.  In this method, proposed by Connell (2004: 8) the deciduous and permanent dentition are given a separate letter or number:

toothrecording

The BABAO 2004 guidelines for compiling a dental inventory for a skeleton. It should be noted that if compiling a large inventory for a population it is best to individually number and identify each tooth after the Buikstra & Ubelaker 1994 standards (but see also Bone Broke). Click to enlarge. Image credit: Connell (2004: 8).

Deciduous & Permanent Teeth

Humans have only two sets of teeth during their lifetimes.  The first set, known as the deciduous (primary or milk) teeth, are the first to form, erupt and function during the early years of life (White & Folkens 2005: 128).  The primary dentition consists of central incisor, lateral incisor, canine, first molar and second molar in each jaw quadrant, making a total of 20 individual deciduous teeth in all.

These are systematically lost and replaced by the permanent, or secondary, dentition throughout childhood, adolescence and early adulthood.  As noted above these include a central incisor, lateral incisor, canine, two premolars, and three molars in each jaw quadrant making a total of 32 individual permanent teeth in all.

The sequencing of the pattern of tooth eruption plays a vital clue in estimating the age of the individual, whilst tooth attrition (wear) is used in estimating individual age after the permanent dentition have fully erupted (White & Folkens 2005: 346).  The loss of a tooth, or teeth, antemortem (before death) can lead to alveolar resorption over the empty tooth socket.  Individuals who have no teeth left (often elderly individuals or individuals suffering periodontal disease) are termed edentulous.  This can lead to problems pronouncing words, the cheeks sagging inwards and problems chewing or grinding food (Mays 1999).  Perhaps the most famous example of this is one of the Dmanisi hominin fossils (crania D3444 and associated mandible D3900) whose crania lacked any teeth whatsoever and showed alveolar bone resorption of both the mandibular and maxillary arches.  However it is unknown if this is evidence of conspecific care, or just of survival, is not known (Hawks 2005).

teeth decid

The human deciduous dentition, notice the absence of any premolars and lack of third molar. The total number of deciduous teeth is 20. Not to scale. Image credit: identalhub.

Deciduous tooth formation begins only 14-16 weeks after conception.  White & Folkens (2005: 364) note that there are four distinct periods of emergence of the human dentition: 1) most deciduous teeth emerge and erupt during the 2nd/3rd year of life, 2) the two permanent incisors and first permanent molar usually emerge around 6-8 years old, 3) most permanent canines, premolars, and second molars emerges between 10-12 years old and finally 4) the 3rd molar emerges around 17/18 years old – although this can vary.  Note also that there are some differences between the sexes and between populations (Larsen 1997, Lewis 2009, Mays 1999).  Trauma, pathological conditions and diseases can also influence tooth development and eruption rates, often delaying the eruption of the permanent dentition and sometimes leaving visible deformities in the teeth themselves, such as linear enamel hypoplasia (sign of stress) or mulberry molars (specific sign of disease) (Lewis 2009: 41).

teeth perman

The human permanent dentition highlighting the 32 individual present. Notice the crown shape and sizes indicating different functions. Not to scale. Image credit: identalhub.

The basic differences between the deciduous and permanent dentition are as follows:

Deciduous…………………….Permanent

1. No premolars.                          2 premolars.

2. Smaller teeth, each              Larger teeth apart from premolars
tooth is smaller than                    which replace deciduous molars.
successor.

3. Cusps pointed &                  Cusps are blunt, crowns not bulbous,
crowns bulbous.                            contact areas broader.

4. Enamel less translucent, Enamel is more translucent, blueish white.
teeth appear whiter.

5. Enamel ends abruptly at    Enamel ends gradually,
the neck.                                             1st molars have no bulge at cervical margin.

6. Occlusally the Bucco-         Buccal and lingual surfaces do not converge,
lingual diameter                              therefore wider.
of molars is narrower.

7. Roots shorter and more    Roots longer and stronger, multi-rooted
delicate, separate close              teeth trunk present and roots
to crown, but are longer             do not diverge near crown.
compared to crown size.

8. Dentin is less thick.               Dentin is thicker.

9. Enamel more permeable        Enamel less permeable, more calcified,
less calcified, more                    relatively less attrition.
attrition.

Above information modified from White & Folkens 2005 and here.

Tooth Class

Teeth in humans are classed into 4 separate classes of tooth based on function and position.  The classes include incisors, canines, premolars and molars, each aiding the other during the mastication of food.

teeth jawline

The human permanent dentition. Notice the larger size of the maxilla (upper) crowns compared to the mandible (lower) crowns and the differences between the roots of the same class of tooth. The first molar is the largest of the molar and the first to erupt. This can tooth can often have evidence of attrition on its cusps and crown when the 2nd and 3rd molars lack abrasion due to the 1st’s early eruption. Not to scale. Image credit: Biologycs 2012.

Maxilla Teeth:

Incisors (general: crowns flat and blade-like, outline of dentine occlusal patch is often rectangular or square if exposed by wear)

The upper incisor crowns are broad (or mesiodistally elongated) relative to their height, and have more lingual relief.  The central incisor crown is larger and more symmetrical than the lateral incisor crown but the roots are shorter and stouter to crown size than to the lateral incisor roots (White & Folkens 2005: 142).

Canines (general: crowns are conical and tusklike, canine roots longer than other roots in the same dentition, can be confused for incisors)

Upper canines are broad relative to their height and have more lingual relief, with apical occlusal wear that is largely lingual (towards the tongue) (White & Folkens 2005: 139).

Premolars (general: crowns are round, shorter than canine crowns and smaller than molar crowns, generally only have two cusps, usually single rooted but can be confused for canines but note shorter crown height)

The upper premolar crowns have cusps of nearly equal size and the crowns are more oval in occlusal outline.  Further to this the crowns of upper premolars also have strong occlusal grooves that orient mesiodistally between the major cusps, this is a key identifier for maxilla premolars (White & Folkens 2005: 140).

Molars (general: crowns larger, squarer, bear more cusps than any other tooth class, have multiple roots, 3rd molars sometimes mistaken for premolars)

Generally peaking the maxilla molars go from largest to smallest (1st molar to 3rd molar) in size and morphology.  The crowns generally have 4 cusps.  The 1st molar has three roots (two buccal and one lingual, which when seen from the buccal position the lingual root comes into view in the middle of the two buccal roots).  The occlusal surface is described as a rhomboid in shape with 4 distinctive cusps.  The 2nd molar has three roots but the two buccal roots are nearly parallel with each other, and is described as heart shape in the occlusal view.  The 3rd molar has three roots present but the two buccal roots are often fused, and the outline of the occlusal surface is also described as a heart shape.  The 3rd molar also shows greater developmental variation than either the 1st or 3rd molars, and are often the tooth that is congenitally missing.  All roots of the molars angle distally with respect to the major crown axes (White & Folkens 2005: 152).

Mandibular Teeth:

Incisors

Lower incisor crowns are narrow compared to their height and have comparatively little lingual topography, further to this the roots are usually more mesiodistally compressed in cross-section (White & Folkens 2005: 139).  The lower central incisor crowns are slightly smaller than the lower lateral crowns, with shorter roots relative to the crown and absolutely than lateral incisors (White & Folkens 2005: 142).

Canines

Lower canines have comparatively little lingual relief compared to the upper canines, and the apical occlusal wear is mostly labial.  The lower canines are also narrow relative to their height (White & Folkens 2005: 139).

Premolars

Lower premolar crowns are more circular in occlusal outline than upper premolars, and have comparatively weak median line grooves.  In lower premolars the long axes of the roots are angled distally relative to the vertical axis of the crown.  When IPCFs are present they are mesial and distal in location (White & Folkens 2005: 150).

Molars

Generally speaking the mandibular molars go from largest (1st molar) to smallest (3rd molar) in size and morphology, same as the maxilla molars.  The 1st mandibular molar is very recognizable as it has the largest crown with 5 cusps in the distinctive Y-5 cusp pattern and a pentagonal occlusal surface.  The two roots of the tooth tend to be long, separate and divergent.  The 3rd molar is smaller than the 1st or 2nd and have more irregular cusps and lack distal IPCFs, it also has two short and poorly developed roots that curve distally.  The occlusal surface is often described as crenelated and ovoid in shape.  The 2nd molar crown is an intermediate of the 1st and 3rd crowns (with 4 cusps) and roots (which have a distal inclination) in morphological terms, but has a distinctive +4 pattern of the occlusal surface.  All roots of the molars angle distally with respect to the major crown axes.

Graphic of the mandibular right quadrant highlighting a few of the specific dental anatomy terms from the above section. Image credit: modified from Gray’s Anatomy here.

Information for this section taken from White & Folkens 2005: 133-152 and here.

For tooth identification there are four questions to bear in mind:

A) To which category (or class) does the tooth belong?
B) Is the tooth permanent or deciduous?
C) Is the tooth an upper or a lower?
D) Where in the arch is the tooth located?

Although I’ve hinted at some of the answers above, those questions are a whole other post!  But do investigate the Human Bone Manual by White and Folkens (2005) for further information and/or Brothwell (1981) and Mays (1999).

Note

This post will be updated to include the muscles of mastication.

Further Information

  • Over at Bone Broke Jess Beck has a number of detailed posts focusing on teeth, with a few entries describing the anatomy of the various classes of teeth in detail (expect future posts though!).  Particularly useful is the Identifying Human Teeth: Human Dentition Cheat Sheet post which can handily be downloaded as a PDF!
  • Check out this handy sheet for anatomical and direction terminology for teeth.
  • The University of Illinois at Chicago have a wonderfully helpful molar identification sheet available here.
  • Can teeth heal themselves? I wish!  Only a bit by demineralization, learn more here.
  • Over at What Missing Link? James R Lumbard has a fantastic post on how the muscles work, which includes a case study on the musculature of the jaw.
  • An in-depth 13-minute dissection video of the muscles of mastication can be found here.  Please be aware that this is a real human dissection.

Bibliography

Brickley, M. & McKinley, J. I. (eds.). 2004. Guidance to the Standards for Recording Human Skeletal Remains. BABAO & Reading: IFA Paper No. 7. (Open Access).

Brothwell, D. R. 1981. Digging Up Bones: The Excavation, Treatment and Study of Human Skeletal Remains. Ithica: Cornell University Press. (Open Access).

Connell, B. 2004. Compiling a Dental Inventory. In Brickley, M. & McKinley, J. I. (eds.) Guidance to the Standards for Recording Human Skeletal Remains. BABAO & Reading: IFA Paper No.7: 8. (Open Access).

Gosling, J. A., Harris, P. F., Humpherson, J. R., Whitmore I.,& Willan P. L. T. 2008. Human Anatomy Color Atlas and Text Book. Philadelphia: Mosby Elsevier.

Hawks, J. 2005. Caring for the Edentulous. John Hawks Weblog. Accessed 29th October 2014.

Koff, C. 2004. The Bone Woman: Among the Dead in Rwanda, Bosnia, Croatia and Kosovo. London: Atlantic Books.

Larsen, C. S. 1997. Bioarchaeology: Interpreting Behaviour from the Human Skeleton. Cambridge: Cambridge University Press.

Lewis, M. E. 2009. The Bioarchaeology of Children: Perspectives from Biological and Forensic Anthropology. Cambridge: Cambridge University Press.

Mays, S. 1999. The Archaeology of Human Bones. Glasgow: Bell & Bain Ltd.

White, T. & Folkens, P. 2005. The Human Bone Manual. London: Elsevier Academic Press.

Guest Post: ‘Glass & Metal’ by Charles Hay

24 Oct

Charles A. Hay is currently aiming towards his next big adventure.  Prior to this he has worked as a field archaeologist throughout England for units such as Wessex Archaeology, Cambridge Archaeological Unit and the University of Sheffield.  He also holds an MA in Archaeology from the latter.  His writings, including investigations of philosophy and original short stories, can be found at his Human Friendly site alongside his numerous drawings, musings and photographs.  If you find him in a pub, he will be having a pint of Pendle or a good scotch.  If it is a working day, then a black coffee will do instead!  Charles has previously written for These Bones of Mine with a guest post titled Welcome to Commercial Archaeology: A Biased Introduction.

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*

On a kind and warm day in the valley, the day after the mid-summer festival, the village children – they called themselves The Valley Pack – wandered lazily down the edge of the gently whispering river.  Their minds were slow under the gentle sun, and their sparse, familiar conversation was carried on the languid breeze.

Violet, the Pack leader, breathed deeply, the aroma of life through her lungs joined her to the world and she smiled, mouth closed, at every one of her friends.  She led because she was the oldest, and because her calm, philosophical and compassionate nature reminded them all so readily of the village leader.  That wizened old oak-tree of a man about whom nobody could bring themselves to speak ill, Noah.  Noah the Very, Very, Very Old, the children called him, his name turning into a chanting song.  The name would always raise the most beneficent, grateful smile in him.  Violet fancied herself as a like mind of his, and anyone who knew her would tend to agree, despite only having lived twelve summers and eleven winters.

Their mission today was simply to wander.  The adults were all hungover and bumbling after the festival.  Nobody needed much food that couldn’t be gathered, after the spectacular feast.  The old ones simply wanted to sit and enjoy their laziness, or their rekindled friendships, or their love.  The children had gathered together at sunrise, as they did on the rest-day, and they had followed Violet.  Their relief had been palpable when she had decided to walk the river rather than the ridge.  Walking the ridge made them feel adult and important, like warriors or drawers of maps, but by The Sun, it was tiring.

From the tops of the valley’s ridges, the children could see as far as was possible.  Noah said that the Earth was actually a ball, and that the horizon was not its edge.  When the children challenged him on this he picked up an apple and a seed.  He showed them how the further away from the apple the seed was, the more of the apple that seed could see.  The higher up the mountain you climb, he said, the further you can see over the horizon.  He held the seed at arm’s length from the apple and said that once, Man had seen the whole of Earth, so far away could humans once fly.  Why can’t we fly now, Noah?  At this, he would smile and tell them that sometimes humans lived in times when impossible things happened, and sometimes they didn’t.  This was simply the nature of eternity.  Violet knew, knew humans would fly again.  She had faith.

“Violet! Violet!” Karl splashed towards her from the middle of the shallow river, where he had been fiddling with stones.  She realised she had been watching him without awareness.  It was such a day, where the mind is completely un-preoccupied, makes no knowing straight lines; simply follows its own internal flow.  It took some real effort of will to focus her vision and bring alertness to her face.

“Karl! Karl!” She mocked, with a crooked, sardonic smile that she had been practicing all summer.  Her mother did it when her father attempted to be authoritative and she loved it.  “What is it? Dragonfly bite you too?”

Unusually for Karl, he was unflustered by her ribbing; he did not play up to her role this time.  He simply splashed over to her and slapped something into her waiting hands, the following arc of water made her blink.  It was like a stone but awfully regular.  It was mostly black and rectangular. Its two sides, flat and of equal size, were water-worn, like the fragments of multi-coloured, misty, translucent stone they found that Noah had informed them were made by flying men and called glass.

“It’s man-made,” she said with artificially disinterested certainty to Karl and, passively, to the others.  “It is made of glass, see?” Her blasé attitude however, was a thin veneer, and the longer she inspected the object, the more it tantalised.  Of white, metallic edges.  An indentation at the bottom of one side.  This could not be a tool; what could possibly be crafted with it?  She hit it against a rock.  It felt almost empty.  No; this would break if used for work.  She realised she had been holding it for some time and Karl was looking visibly distressed with impatience to get it back.  “Karl, remind me later, and we’ll take this to Noah, or my mother.”  She handed it back and Karl conspicuously scrutinised the point at which it had impacted the rock.  “What do you think it is, Karl?”

All the children were now staring at them both, fascinated with the object from the river and jealous of Karl’s new-found lieutenancy.

“I think…” he clicked his tongue and looked at the black, rectangular glass thing over and over.  “It could be a jewel? Or part of something else? This could be part of a contraption? A weight or something?”  His eyes implored to Violet, then directly to the object itself.

“I wonder what’s inside it,” said Kyle, who thought in recursive riddles that he often found difficult to communicate.  “It could… do something itself. It might not be a tool. It might be made of tools.”

Violet was patient with Kyle, and her eyes delved into his eyes to let him know that she at least would attempt to comprehend his mind.  He smiled nervously.  The moment was shattered by Dawnlight snorting, “and what would something so small do for anyone Kyle?”

Violet could not resist purpose.  She stood, and marched them back up the valley to home, and the quietly comprehending world of adults.  As they walked along the gently singing stream, the sighs of the breeze through long grass brought to Violet images of people in impeccable grace, regarding their opaque, senseless trinket with total comprehension, and she ached with her whole being to see the world through their eyes and to know it for what it truly was, and what it truly meant.

*

As it happened, Violet’s mother was strolling slowly with Noah.  Violet and her mother exchanged a small smile, their version of a heartfelt hug.  Noah regarded the squadron of children with mock incredulity, ready to launch into a joke-tirade and inquisition of action and intent.  His humour was instantly transformed into warm wonder though, when Karl presented his find.

“He found it in the river Noah; Mum. Didn’t you Karl?”

“I found it in the river. In the muddy bit beneath the rocks. It doesn’t do anything, we just wanted to… Sorry Violet.”

Violet smiled with affection; said, “it’s your find Karl, you tell them.”

Karl stuttered a bit before asking, “do you know what it is Noah? We wondered if it was a tool of the flying humans you said about, or if it was part of one of their con… con-contraptions. Contraptions.”  His expression flickered between pride and worry that he had used the wrong word.

There was something akin to comprehension on Noah’s face as he looked at the small box.  He murmured, almost totally inaudible, “twice the length of a thumb, made of glass and metal. I wonder if this isn’t some sort of… machine.”  He was talking to himself, in a way that those who knew him were completely accustomed to.  They also knew that to interrupt this vocal thought would result in mild irritation.

“Karl,” Noah said, his expression earnest and honest.  “This is either to fit in a hand or a pocket, but we cannot make use of it. It may have been part of something, as you said, or it may simply have been a good luck charm; a talisman.  It is rather fun simply to look at, isn’t it?  You keep it, young man, it’s yours.”  He gave it back, and Karl clutched it.  The mild disappointment was obvious on his face.

“I’m sorry, young man, you wanted an answer.  Well I’ll tell you this: that little box of yours was somebody’s at sometime.  The things it is made out of are what they made their world out of. Remember, glass and metal.  That’s what that is.  Whilst they kept use of things made of glass and metal, they changed the world for themselves.  They were more powerful than the river or the wind or even the enormous Earth.  With that in your hands, you are one step closer to all that than us.  You hold a fragment of a world in which humans were fearless and infinite.  Treasure it; you are holding history, and hopefully the future as well.”

Karl’s eyes were glassy with wonder now, and his expression did not change even when Noah quietly laughed internally and mussed his wiry hair.  He held the small black rectangle to his heart, not possessively, but as one would a small, tamed animal.

Watching and listening, Violet felt something new within her.  Her gentle fascination gave way to something else. She looked at Karl and his talisman, she felt… Yearning for this thing.  She chided herself for coveting this belonging of her good friend.  She tried to think only kind things, as she had been taught.  She tried to think of Karl’s happiness, and how that increased the happiness of the village.

But she wanted it, she knew.

She needed it.

*

Ungulates Gnawing: Osteophagia & Bone Modifications

24 Oct

Osteophagia: Osteophagia is the act of ungulates (including giraffes, camels, cattle, etc.) chewing on another species skeletal remains to gain nutrition (particularly minerals such as phosphorus and calcium) that may be lacking in other parts of their largely vegetarian diets.  This includes the chewing of antlers, horns and ivory, as well as skeletal elements.  It is a relatively well documented animal behaviour that occurs across numerous taxa and across continents.

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I’ve been meaning to highlight this article by Hutson et al. (2013) for a while as it nicely illustrates the actions of animals in the archaeological record that can sometimes be interpreted, or mistaken, for a human or taphonomic origin.  Hutson et al. (2013) discusses the impact that ostephagia can have on archaeological contexts and carefully identifies the differences between large and small ungulate osteophagia-based actions.  Taking 12 individual and observed case studies of osteophagia examples recovered from modern field contexts in Australia, North America and Africa, the study highlights the different styles of bone modifications made by each species to help identify the often distinct bone modifications that they leave in their wake.  The case studies include examples of wildebeest (C. taurinus) bones having been gnawed by giraffes, elephant (Loxodonta africana) ivory gnawed by kudu or sable antelope, and a camel (C. dromedarius) radius fragment having been gnawed by a camel.

Hutson et al. (2013: 4140) notes that ‘previous studies have shown that ungulates gnaw both cortical and cancellous bone and elements in almost any state, from fresh to completely bleached, desiccated, and weathered”.  The favoured bones to gnaw during scavenging among ungulates are elements of the long bones, vertebrae, scapulae, skulls and ribs, and, if munching on long bones, the larger ungulates often position the axis of the bone ‘like a cigar held in a human mouth’ (Hutson 2013: 4140).

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This diagram shows porcupine gnawed B. taurus limb elements, where a) is the right tibia and b) is the left femur. Notice the what look like long striations, which are in fact gnawing lines (click to enlarge). Image credit: Fig 8 from Hutson et al. 2013: 4147.

Importantly, the authors differentiate the classes of ostephagia-based bone damage caused by large ungulates and compare it to the typical bone damage caused by carnivores and other primarily meat-eating scavengers, such as lions, panthers and tigers.  This comparative approach takes into account 10 separate features of bone damage often found on gnawed skeletal remains (including evidence of prey selection, bone selection, bone state, bone transport, tooth mark type and general morphology amongst others) and highlights the varied differences between the two behaviours of ungulates and carnivores (Hutson et al. 2013: 4148).  Perhaps of primary importance in this article is that fact that tooth morphology varies according to species and purpose, as such the authors explicitly highlight that, alongside this, the age of the individual animal, and thus the state of its teeth, gnawing the bone can affect the patterning expected (Hutson et al. 2013: 4147).

ostephagia hutson etal13

This rib was found at the fringe of a scatter of skeletal elements from one individual. Showing the distinctive forking and crushing of ungulate gnawing, this B. taurus rib was likely gnawed by cattle whilst still relatively fresh. Image credit: Fig 6. in Hutson et al. 2013: 4145.

Of course care should always be taken in the recording of gnawing evidence, as teeth in both humans and non-humans can wear down and gouging styles can vary.  However, the distinguishing marks made between ungulates during the act of osteophagia and the selectivity of active carnivores and scavengers is vital for the archaeologist as it can infer on the context of the gnawed skeletal remains.  This can help identify the fauna previously present on-site and the actions that took place based on replicating the known evidence.  The analysis of faunal bones at archaeological and palaeoanthropological sites should, of course, be used in conjunction with other taphonomy techniques to fully understand site formation.

All in all, this is an interesting paper that adds real depth to the taphonomic literature and should be of note to both archaeologists and palaeoanthropologists in interpreting the actions of both humans and non-humans during site formation.

Update 26/10/14

Osteophagia is just one method that mammals use to gain extra nutrients in their diet, another method is mineral lick.  As with osteophagia it has long been noted that animals will exploit their environments by eating or otherwise digesting natural soils, clays and rocks to gain elements (particularly salt) that may be missing in nutrient poor ecosystems (Lundquist & Varnedoe Jr 2006).  Mineral lick is particularly prevalent among giraffes, elephants, moose, cattle and tapirs (and other mammals) as a way to increase the amounts of minerals, such as potassium, calcium, sulfur, phosphorus, and sodium, in their diets.  Although the knowledge of so-called salt caves and their origin with animal behaviour is well know, it is thought that they are under-estimated in current estimates of their prevalence (Lundquist & Varnedoe Jr 2006: 18).  As such these natural landscape features should also be taken into account when understanding the formation and duration of palaeoanthropological and archaeological sites.

Bibliography

Hutson, J. M., Burke, C. C. & Haynes, G. 2013. Osteophagia and Bone Modifications by Giraffe and Other Large Ungulates. Journal of Archaeological Science. 40 (12): 4139-4149.

Lundquist, C. A. & Varnedoe Jr, W. W. 2006. Salt Ingestion Caves. International Journal of Speleology. 35 (1): 13-18. (Open Access).

Guest Post: The Rise of BAJR Part III by David Connolly

15 Oct

David Connolly is the founder of the British Archaeological Jobs and Resources (BAJR) website and runs, along with archaeologist Maggie Struckmeier, the Past Horizons website, a web portal specializing in the reporting of archaeological news and projects from around the globe.  Formerly a guitarist and key member of punk band Oi Polloi, David left to pursue a career in archaeology and subsequently worked the British field circuit for a number of years.  He has also excavated and surveyed sites in far-flung places such as Croatia, Turkmenistan, United Arab Emirates and Jordan.  His experiences at York helped him form a keystone in his belief of the use of methodologies in archaeological practice.  Currently residing in Scotland, David specializes in archaeological surveys and regularly partakes in community archaeology projects.

Part 1 in this series, detailing David’s background and the inception of BAJR, can be found here.  Part 2 in this series, detailing the rise of BAJR and it became what it is today, can be found here.  This is the third and final part in this series.

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BAJR III

As previously reported, BAJR was founded in 1999 on the same campaigning principles as the radical Digger newsletter, and BAJR has grown into one of the most recognizable and trusted sources of archaeological employment opportunities and advice in the United Kingdom.

However, to remain fixed in the past is to ignore the ever-changing environment that surrounds us all, and so BAJR is evolving in 2015 in an effort to embrace this.

Employment at the heart of BAJR

One aspect that remains core to the website is the provision of advertising.  BAJR will continue to protect the lowest grades of workers within the industry, while providing a new platform to encourage trainees and internships, within a strictly formalised system to prevent misuse of less skilled staff as a means to cut costs.  Discussions are now being held to consider the implementation of a single minima system, which relates to (mainly) the G2 fieldworker or PIfA.  Here the only minima that a contractor must abide by will be this figure – currently £17,094.  Any payment over £250 more than this rate would be presented with a More than Minima badge.

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Jump on board and help the archaeology sector gain the credit it deserves!

The grading system will still remain in order to provide a background to the level of responsibility expected, but no minima will be attached.  This at first sounds like an invitation to pay less, but tied to the following innovation on the BAJR website – the regional pay map – it is designed to have exactly the opposite effect, by providing a constantly updated average pay rate for various ‘standard’ grades such as supervisor, project officer and managerial posts, matched to geographic areas of the UK.  Knowing the base rate, both the prospective employee can see who is paying the best rate, and employers can judge if they will be able to attract staff based on their current wage level.  It is hoped that securing the basic minima, and allowing the market to dictate the levels beyond this, it will effectively cause rates to rise in order to gain the best staff.

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Copies of the Archaeology Skills Passports ready to be sent out. It is all about the record keeping of your achievements and hard work in the archaeology sector so that it is recognised professionally.

Beyond this it is imperative that the companies are allowed the opportunity to display the range of benefits that they provide, over and above the blunt instrument of the weekly pay packet.  The new BANR (British Archaeological News Resource) and the original BAJR website will include a section that allows ‘like for like’ contractor comparison.  This page will include a range of benefits from overnight subsistence payment to travel time remuneration; research opportunities available from the company and even a list of recent flagship projects to show the potential a new employee can expect.

Archaeology Skills Passport

Currently, there are also a number of companies who are considering the Archaeology Skills Passport as a means to broach the issue of standardized and transferable skill/training documentation.  They have advised they could all save time/money by pooling resources by mapping their own individual needs (on introductory training in particular) across to the passport.

Utilization of the Archaeology Skills Passport and it’s adoption as a basic training record across the profession that allows for progression – fits well with recognising the requirements for the lowest level pay rate.  If you have completed the Primary Skills section in the passport, you have shown yourself worth the G2/PIfA minima rate.  Otherwise you are still in training.

This creates a singular goal for people because it is made clear what is required.  Better than a CV and also fairer than the start at the bottom every time situation that has been so prevalent for fieldwork jobs, and we all know so well.

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The Archaeology Skills Passport is a handy book designed to help build up your skill base by getting a supervisor, site director or lecturer to sign off on the skills that you have completed on-site. Designated into Core Skills (Section drawing, troweling etc.), Secondary Skills (finds processing, geophysics etc.), and Tertiary skills (report writing, outreach etc.) sections this booklet acts as a record to your achievement. Get yours here.

BAJR will always be there for anyone who needs advice on any level along with access to good quality information.  The forum has been strengthened with a Facebook and Twitter presence, so discussion has become even more interesting and far-reaching.

What is still black and white and read all over?  Why BAJR of course… and one thing is for sure, it is you who make it so.

Further Information

  • You can read more about the project concept of the Archaeology Skills Passport here.
  • Hang out with some diggers at the BAJR Federation Forum.
  • Want a job in British archaeology?  Start here!
  • The new and revamped Past Horizons website has been launched for all of your archaeological news needs.

Bone Quiz: Revisiting Germany

14 Oct

Unfortunately I’m only visiting Germany in this blog entry and not personally!  Germany has recently been in both the education news and the osteo news though, so I’m always happy for a tenuous link to one of my favourite countries.

Free Education!

There has been a recent announcement that each of the 16 autonomous states in federal Germany have now abolished their tuition fees at their public universities, with both German and international students being allowed to take academic courses tuition fee free from 14/15 (as long as they are completed within a reasonable timescale).  Each state (Länder government) in Germany is responsible for its own education, higher education and cultural affairs, and higher education is a public system funded with public money.  This is a major step for Germany, although the decision can of course be overturned in the future as states weigh up various options ad political climates change.  Recent economic news has shown that whilst the UK and USA economies are growing (slightly), the Eurozone as a whole is still stagnating and economically contracting – still, Germany is certainly doing better than some of its economic partners in Europe.

Past Populations

Meanwhile, over at the University of West Florida Kristina Killgrove (of Powered by Osteons fame) and graduate research assistant Mariana Zechini have started a new project blog aimed at investigating and digitally documenting archaeological artefacts and biological remains.  One of their first projects was the 3D scanning and modelling of the teeth of individuals from the medieval population of the city of Cölln, in eastern Germany (see here).  Cölln was the sister city to Berlin, each probably founded around the 13th century on opposite sides of the river Spree, which today snakes through modern-day Berlin which now engulfs both sides of the river.

Taking place at the Virtebra lab (Virtual Bones and Artefacts lab) at the university, the aims are to digitally preserve and produce 3D models of the teeth to help kick-start a teaching collection.  The remains, from archaeological deposits identified as the city of Cölln, were recovered from the German excavations of a large medieval cemetery that took place at Petriplatz, Berlin, from 2007-2010, which uncovered the remains of 3718 individuals.  Back in 2013 Dr Killgrove also took the teeth to be tested for strontium isotopes (geographic) at UNC Chapel Hill (read more here) and the latest Virtebra blog post discusses the results of some of these tests (here).  I don’t want to spoil the results, so check out the blog entry and read up on the interesting archaeology of Cölln and Berlin!  The teeth that have been scanned are available and accessible as models at the GitHub site here.

Bones, Bones, Bones…

So this German (osteo and education) news reminded me of the 6 happy weeks I spent in the wonderful city of Magdeburg, on the EU-funded Grampus Heritage organised Leonardo Da Vinci scheme back in 2011.  I worked with a bunch of awesome UK students with a wonderful German team and, rarely for archaeology, it was a fully funded project.  It was on this archaeology trip that I got to excavate human remains in a medieval cemetery, which was a real honour.  But I wonder if anybody who reads this blog wants to test their own osteo skills and identify the bone and its osteological landmarks below….

1. a) Identify the largest skeletal element inside the yellow rectangle.

—-b) Adult/non- adult, and why?  Side the bone.

2. a)  Identify the structures in the red circle.

—-b) Name 2-3 muscles that have tendons that insert on either of the structures.

Memories of Magdeburg, Deutschland. A few of the skeletal elements part way being sorted for cleaning before the specialist documents them. Photograph by author.

I’ll put the answer up in a week or so – in the meantime please feel free to comment away.

LBK Almost Got Away

I almost forgot to mention that I’ve also conducted previous archaeological research into mobility of the Neolithic Linearbandkeramik (LBK) culture for my MSc dissertation back in 2012.  The focus was on the statistical testing of the results of a literature review of strontium isotope results from 422 individuals across 9 LBK sites in Central Europe, with the main cluster of sites located in southern Germany.  You can read my research here!

Previous Bone Quiz

Further Information

  • Learn more about the Virtebra Project at the University of West Florida blog site here.
  • Read about how the German state funded universities managed to become tuition-free for both German and International students here at the New Statesman magazine.  Read more here for what the costs involved can be to live and study in Germany, including the costs of attending the private institutions which are not publicly funded.
  • Learn more about Grampus Heritage & Training Limited here.  Opportunities for both undergraduate and postgraduate UK students to take part in field archaeology in Europe can be found here (undergrads) and here (postgrads).  A previous guest post by Grampus Heritage on this blog highlighting the spectacular range of projects that have been available previously can be found here.

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Bone Quiz Answer

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muscles galore.

Bits & Pieces: Open Archgaming Research, Buried, Sulawesi Art, & Desert Island Archaeologies

9 Oct

There have been a few things I’ve been meaning to highlight recently on the blog, but I thought I’d just highlight them in a single entry for your pleasure!

  • As readers of the blog may be aware I’ve never really covered archaeological gaming before.  I’ve been reading the fantastic Archaeology of Tomb Raider blog by Kelly M for a while though, and I understand that gaming is playing a fundamental role in how the general population are introduced to archaeology and cultural heritage at relatively early ages.  Gaming archaeology is fast becoming a unique way of conducting research at the intersection of gaming technology and archaeological research, often using multidisciplinary approaches.  I’ve recently discovered the delightful Archaeogaming blog, where the author has decided to be fully open about his research plans.  This includes posting copies of his original PhD research proposal and the revised edition that he has now submitted to the University of York, which has a recognised digital archaeology research cluster.  The department also offer a new MSc in Digital Archaeology, which looks pretty exciting.  The fact that Archaeogaming put up his research proposals is a great breakdown in the often secretive world of PhD applications (though of course many blogs are also breaking this down).  The posts were particularly informative for me in understanding how to structure a proposal – the content was interesting, invigorating and now I want to know what happens next!  I wish Archaogaming good luck.
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  • The blog actually led me to me next port of call which is the fantastic free online text base game Buried, produced by University of York researcher Tara Copplestone and Luke Botham.  The game, produced for Tara’s MSc dissertation as a proof of concept and entered into the University of York’s 2014 Heritage Jam, offers the gamer an interactive opportunity to learn about archaeology by role-playing in a wide variety of opportunities.  As Tara states on her website: You play as a young archaeologist who has just returned from a field season and is grappling with the ups and downs of personal life, academia, archaeology, the past, the present and hopes for the future (Copplestone 2014).  The game itself is fairly short, but it is packed full of background on the process and meaning of archaeological investigation, covering a number of different theoretical underpinnings and approaches.  You can also change a wide variety of options so the game is instantly re-playable for any number of times.  I cannot recommend taking part in the game enough, it is a thoroughly rewarding and innovative experience which offers a stimulating environment  to learn both about archaeology and yourself.  Archaeogaming also a full great review of the game here, which is what initially alerted me to Buried’s existence.  Tara also has a number of different archaeology games at her main site here, it is well worth a look!

    buriedgame tara copplestone

    The opening shot of the fantastic ergodic literature style game Buried, by Tara Copplestone and Luke Botham. Not only does this game introduce to the public what post-excavation archaeology is like but it also interlays the information and choices that the player can make, making the game eminently re-playable. Click to play here. Image credit: Copplestone & Botham.

  • Meanwhile I recently had the great chance to participate in UCL researcher Lorna Richardson’s Desert Island Archaeologies project.  Lorna’s interesting project is aimed at highlighting the Top Ten archaeology books that you would take away with you if you were deserted on an island in the middle of a great vast ocean.  So far there have been 14 very interesting entries from around the world of archaeology, with people such as BAJR’s David Connolly and Microburin’s Spence Carter (Yorkshire central!) taking part in it.  As you’d probably expect by now my entry was fairly eclectic, mixing the core human osteology and bioarchaeology textbooks with some of my favourite literature (bit of García Márquez) and travel books (Can’t beat Cees Nooteboom!).  If you’re an archaeologist or at all involved in cultural heritage or history I recommend sending Lorna an email saying  you’d be interested in participating.  One of my personal favourite entries so far is the succinct archaeologist Tom Cromwell, who links to a beautiful article by Kent V. Flannery (1982) detailing the wonderful world of archaeology in a creative and eye-opening piece of writing.  The Flannery article is also the origin of the wonderful phrase that archaeology is the most fun you can have with your pants on!
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  • Finally there has been some incredible news regarding the cave art (human hand stencils and animal paintings) in Sulawesi, Indonesia.  The extensive and beautiful hand and animal markings located on the Maros-Panpkep karst landscapes of Sulawesi, originally thought to date to under 10,000 years old or so,  has now been re-dated using new uranium-series dating of coralloid speleothems to around 27,000 to 40,000 years old (Aubert et al. 2014).  This is amazing news as it makes it some of the oldest cave art in the world (that is parietal art), located far outside of Western Europe, which has long been thought to be the nexus of this crucial development of art by Homo sapiens (Roebroecks 2014: 170).  The research also just goes to show the value of re-investigating old archaeological sites using new technologies and calibrations.  Indonesia is fast becoming of the most interesting archaeological landscapes.  For further information the BBC have an article here with some great photographs of the site and the Guardian article can be found here.  Nature also have a video up here, which places the artwork into the context of human artwork globally.
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One of the panels of rock art at the site of Leang Timpuseng highlighting the dated coralloid speleotherms (that formed and acculminated after the art work was completed) and associated paintings. The kartst limestone environment of Maros-Pangkep is rich in such rock art works (Aubert et al. 2014: 224).

10/09/14 Correction

Sulawesi was incorrectly spelled on the initial blog entry.  Further to this the latest scientific articles have been added to the bibliography and detailed in the entry about the site above.

Bibliography

Aubert, M., Brumm, A., Ramli, M., Sutikna, T., Saptomo, E. W., Hakim, B., Morwood, M. J., van den Bergh, G. D., Kinsley, L. & Doesseto, A. 2014. Pleistocene Cave Art from Sulawesi. Nature. 514: 223-227.

Flannery, K. V. The Golden Marshalltown: A Parable for the Archaeology of the 1980s. American Anthropologist. 84 (2): 265-278. (Open Access).

Roebroeks, W. Art on the Move. Nature. 514 : 170-171.

Lost Kingdoms of Central America: Teotihuacan

8 Oct

The Mexica, otherwise known as the Aztecs (1), called the city Teotihuacan in their Nahautl language, roughly meaning the place where time began.  Nestled in the Valley of Mexico the Pre-Colombian city of Teotihuacan is one of the archaeological jewels of Mexico, where the pyramids of the Moon and the Sun dominate the 4km long Avenue of the Dead.  Situated around this planned civic ceremonial complex were the residential barrios of the population, largely organised along ethnic lines, consisting of open plazas surrounded by inward looking residential compound (Goodman 1999).  The 16th century rulers of Tenochtitlan, the powerful city-state at the centre of the Aztec Empire now located under modern-day Mexico City, regarded Teotihuacan as the foundation of Central American civilization  (Evans 2008).  As Dr Jago Cooper of the British Museum recounts in the new BBC series Lost Kingdoms of Central America, the city of London itself would not pass the total population of Teotihuacan at its peak (around 100,000 people) until at least the 16th century.

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The Temple of the Sun at Teotihuacan, dominating the Avenue of the Dead. To the sides of the avenue the smaller ceremonial structures can be seen. Image credit: BBC.

The City and It’s People

As grand as the remains of the city of Teotihuacan (100 BC to AD 650) are, it is the site itself that has withstood test of time, allowing archaeologists and researchers to excavate, plan and map one of the largest cities that the 1st millennium AD world had ever seen.  Today Teotihuacan is a UNESCO world heritage site, chosen for its unique history, sheer magnificence and the incredible physical survival of planned city with a multi-ethnic population.  During the city’s history there were around 2300 stone built apartment compounds that could house up to hundred to the dozens of people, although there have been suggestions that were ‘invisible houses’ constructed on the outskirts of the urban planned city consisting of unwalled house dwellings (Evans & Webster 2005: 615).  There has been some suggestions that a portion of the early population came from the nearby basin city of Cuicuilco, which was destroyed by a volcanic eruption (Xitle) in the 1st century AD (Evans 2008).

The monumental civic architecture is heavily associated with the religious rulers of the city, although no formal burial location of such a leader has been excavated or documented.  The pyramids of the Moon (2nd largest, constructed around 200-450 AD) and the Sun  (largest, constructed around 100 AD) are the largest buildings found at the city, and would have originally had constructed temples on their summits.  The remains of adults and non-adults have been found around the perimeters and base corners of the pyramids, suggesting sacrifices (Evans 2008).  Tantalizingly the documentary highlighted the ongoing archaeological excavation of a man-made cave under the 3rd century AD Feathered Serpent Temple building, as Dr Cooper interviewed the archaeologist Sergio Gomez on what could possibly contain the remains of one of Teotihuacan’s leaders.  Excavations at the temple have also uncovered the remains of 260 individuals who had likely been sacrificed around 300 AD.  Sugiyama (2005) suggests that the remains of individuals found at the temple probably highlights individuals who were taken from conquests outside of the city or represent individuals chosen from certain areas, the archaeological evidence shows that the individuals likely had bound hands and were carefully positioned into place and decorated heavily with artefacts of value.

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The beautiful mural art of the Great Mother Goddess of Teotihuacan, found at the Tepantitla complex and currently residing in the Anthropology museum in Mexico City. Image credit: Thomas Aleto via Flickr.

Although home to numerous gods as was typical for the Pre-Colombian cultures in the Valley of Mexico, the Great Goddess of Teotihuacan is a god unique to the Teotihuacan population, appearing only where they have settled and appearing little after the downfall of the city around the 6th century AD.  Surviving murals in the city suggest that the individual was valued only as a part of the population, and that the gods were venerated above this.  As Evans (2008) discusses it was a rich theme in Pre-Colombian cultures that geography played an important part in understanding the cosmology and origin of the human population.  Evidence of this has already been highlighted above with reference to man-made caves, but even the monumental architecture echoed the surrounding topography as evidenced by the outline of the pyramid of the Moon (Goodman 1999).  As Dr Jago Cooper highlights in the program the belief system of binding people together through religion is not just found in the monumental architecture but also through the mural artwork and the social roles of groups (not individuals) within Teotihuacan society.  Sugiyama (2004: 99) remarks that the influence of Teotihuacan around the Basin of Mexico was notable with extensive trade links (obsidian, ceramics, foodstuffs, cotton, etc.) and it has been proposed that at least some of the leaders of the Maya city states in the Yucatan region in the Atlantic bay of Mexico may have originated from Teotihuacan (Webster & Evans 2005).

Brief Thoughts

I was first introduced to Central American archaeology during an undergraduate module focusing specifically on Pre-Colombian Archaeology, and it is always a subject that has remained vital to my understanding of archaeology as a dynamic subject.  The civilizations of Central America remind me that although archaeological sites today appear dull and dirty (think of the marble and building work of the remains of Ancient Egypt, Greece, and Rome), more often than not they were once coloured and painted, that they were (arguably still are) integral as to how a population (or society) referred to both itself and as to how it wanted others to see it.  The ceremonial stonework around the Feathered Serpent Temple at Teotihuacan seems that bit more visceral to me than the often firm and stately sculpture of Ancient Egypt, or say the perfect bronzed anatomy of the finely wrought representations of human flesh prevalent throughout the city states of Ancient Greece.

Of course one of my main interests is in prehistoric archaeology (alongside osteology), but that doesn’t mean that influence cannot be drawn from around the world and from different time periods.  This is just a very short introduction to the city-state of Teotihuacan, but there are some further resources to have a look at below.  I highly recommend watching the Lost Kingdoms of Central America series as the episodes are informative, interesting and present up-to-date research on the sites that the series focuses on, particularly the ongoing archaeological excavations at Teotihuacan.  Archaeologists and anthropologists have uncovered and discovered a lot of information on the society, architecture, economy and religion of the Teotihuacan city-state that came to dominate the Basin of Mexico, yet there are many unanswered questions remaining, perhaps prominent of which are the identities of the rulers of the city themselves.

Note

(1).  The Aztec term, in this sense, relates to the rise of the Aztec Empire during the Mexica Triple Alliance (Ēxcān Tlahtōlōyān) of the city states of Tenochtitlan (Mexica), Texcoco (Tepanec) and Tlacopan (Acolhua), who together ruled the valley of Mexico from 1428 until the Spanish Conquest of 1521.  Of these three city states it was Tenochtitlan, with a population of over 200,000, which gained dominance as the capital of the Aztec Empire.

Further Information

  • The 4 episodes of the Lost Kingdoms of Central America series can currently be found on the BBC Iplayer site (UK only, although I’m sure they can be somehow viewed outside of the UK).
  • The program is running in conjunction with the British Museum.  On their website you can find out more information on the four cultures explored, including information on the Olmec, Chiriquí, Teotihuacan and the Taíno cultures of Central America.
  • For any student studying for a degree or module in, or interested person intrigued by, the archaeology of Central America, I highly recommend getting your hands on a copy of Susan Toby Evans‘s 2008 publication Ancient Mexico and Central America: Archaeology and Culture History (third edition out in 2013).  It is an in-depth and detailed book that highlights through clear text, diagrams and photographs the great wealth of the physical remains and cultural history of this part of the Americas.
  • Learn more about the intriguing tunnel under the Feathered Serpent Temple and its excavation by archaeologists from the National Institute Anthropology and History here.
  • I’ve blogged previously about some of the cultural destruction at Teotihuacan here.

Bibliography

Evans, S.T. 2008. Ancient Mexico and Central America: Archaeology and Culture History. London: Thames and Hudson.

Goodman, D. 1999. Cities of the New World. In: Chant, C. & Goodman, D. (eds.). Pre-industrial Cities & Technology. London: Routledge. pp.242-262.

Sugiyama, S. 2004. Governance and polity at Classic Teotihuacan. In: Hendon, J. A. & Joyce, R. A. (eds.) Mesoamerican Archaeology: Theory and Practice. London: Blackwell Publishing. pp.97-123.

Sugiyama, S. 2005. Human Sacrifice, Militarism, and Rulership: Materialization of State Ideology at the Feathered Serpent Pyramid, Teotihuacan. Cambridge: Cambridge University Press.

Webster, D & Evans, T. 2005. Mesoamerican Civilisation. In: Scarre, C. (ed.) The Human Past. London: Thames & Hudson Ltd. pp.594-639.

The Bone Ages: MOSI on Down to the Manchester Science Festival, Sunday 2nd Nov 2014

3 Oct

A date for the diary for all bone and science lovers!  Skeletal researchers from the University of Sheffield and Manchester Metropolitan University will be at the Manchester Museum of Science & Industry (MOSI) on Sunday 2nd of November 2014 (from 10.30 am to 4 pm) helping to present an event called The Bone Ages to the public.  The Bone Ages will bring together the social sciences and lab based research in helping to present the wonders of studying the human skeleton, detailing how bones can teach us about the history, health and society of past populations and individuals using live demonstrations.  The event will include interactive showcases and activities for children and adults of all ages, from learning about how to age and sex the skeleton to understanding what DNA testing of skeletal material can reveal.

The Bone Ages event is being run at MOSI as a part of the Manchester Science Festival (which runs from 23rd October to 2nd November), which is aimed at engaging the whole family in understanding the wonders of cutting edge science and ground shaking research.  The Manchester Science Festival is free to attend and will be running a whole host of events to do with innovative scientific topics in a variety of locations across Manchester.

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A flyer from the website advertising the Bone Ages open day. Image credit: MOSI.

So what is actually happening at the Bone Ages event?

Well there will be a host of hands on demonstrations and live shows by the researchers of the Manchester Metropolitan University and the University of Sheffield staff.  There will be four staff from MMU who each specialise in different areas of skeletal research including:

  • Dr Craig Young (human geography), who will be discussing the importance of human remains as a part of the socio-political processes linked to cultural identity.
  •  Dr Seren Griffiths (archaeology), who will provide a live demonstration of 3D laser scanning and talk about the importance of the technique to accurately digitally record excavated specimens.
  • Dr Kirsty Shaw (molecular biology), who will be demonstrating the application of miniaturized technology that allows the DNA sampling of remains in the field.
  • Dr Alex Ireland (health science), who’ll be demonstrating how scanning bones can reveal the permanent record of previous activity, to help prevent health risks in the present day population.

On top of this researchers from the University of Sheffield, including doctoral candidate Jennifer Crangle, will be discussing and highlighting the value of analysing the human skeleton, from how to age and sex remains (using casts and examples) to talking about the nature of archaeological bone, from complete to fragmented remains.  I will also be there, helping to engage the public how and why osteoarchaeologists analyse bones and generally helping out.  Alongside this I’ll also be assisting with the exciting ‘exploding skeleton’, a fun and interactive way to learn about the skeletal anatomy of the body by having members of the pubic trying to figure out what piece goes where in the human body.

The demonstrations for The Bone Ages will be taking place at the new purpose built PI: Platform for Investigation arena at the museum, which is part of a new monthly contemporary science program aimed at the bold, innovative presentation and engagement of science with the public.  I, for one, am thoroughly looking forward to this, so I hope to see you there!

Learn More

  • Look out for the #boneages hashtag on twitter for further information and updates.  There will also be a number of guest blogs produced for the Manchester Science Festival, which will also appear on the Institute of Humanities & Social Sciences Research, run by Manchester Metropolitan University.
  • The Manchester Science Festival runs from 23rd October to the 2nd of November, with events being ran all day, and for free, during these dates.  The festival will fuse art and science together in an intoxicating mix for all of the family, with topics ranging from industrial archaeology to 3D printing, from film showings to computer coding.  Find out more here.

Revisiting ‘Nazi War Diggers': Editorial in the Journal of Conflict Archaeology

30 Sep

In the latest edition of the Journal of Conflict Archaeology there is an editorial that briefly discusses the professional response of archaeologists (via social media) to the proposed (and now cancelled) National Geographic Channel show Nazi War Diggers (Pollard & Banks 2014).  As readers of this blog, and other archaeological blogs, may be aware that a whole can of worms was opened when the National Geographic Channel started to advertise their Nazi War Diggers program online.  The clips that the station put up online showed almost zero respect to the uncovering and exhuming of the dead of WWII on the Eastern Front (the clips shown seemed to focus primarily on a battleground site in Latvia), and little (if any) attention paid to the archaeological context of the remains themselves.

Field archaeology is a largely destructive method of uncovering and documenting a unique and non-replenishing resource, hence why great care is taken in the contextual recording and analysis of archaeological sites in various mediums (in the use and application of excavation methodology, on-site recording, recording of site formation, specialist reports, conservation of artefacts, film photography, digital media, etc.).  So it was no surprise that, when the footage of Nazi War Diggers was promoted, archaeologists and other heritage specialists were horrified at the unprofessional and unethical treatment of both the human material recovered and of the associated artefacts, such as the Nazi memorabilia uncovered.  Perhaps what was/is even more worrying is the long-term deposition and custody (i.e whereabouts) of the remains and artefacts that were excavated, alongside the actual legality surrounding the actions of venture itself.  As osteoarchaeologist Alison Atkin succinctly highlighted at the time – ‘it  is every kind of wrong’.

As Pollard & Banks (2014: 51) remark it was not just social media that picked up on the outrage of the show but also mainstream media, such as newspapers, that highlighted the professional and personal distaste with the Nazi War Diggers program.  A very important point here is highlighted in the editorial, which bloggers such as Sam Hardy at Conflict Antiquities also noticed, was how the National Geographic Channel replied.  The company removed the questioned video from their site, edited the text and removed damaging quotes from the lead presenter (‘by selling things that are Nazi related and for lots of money, I’m preserving a part of history that museums don’t want to bother with‘, as quoted in Pollard & Banks 2014: 51).  As readers will no doubt be aware individuals who fell in the Second World War can still be identified, can still be returned to their families for burial, can still have living relatives who may have known them.  With these points in mind, even barring the unethical exhumation and nonsense comments, it becomes clear that the treatment of the remains on Nazi War Diggers was, at the least, potentially offensive.

Still the debacle helped to unite a range of heritage professionals in condemnation and, to their good and commendable credit, the National Geographic Channel have pulled the show and have started an inquiry.  This very fact highlights that the company have at least heard the views of the many professional individuals and members of the public that have contacted them (tough though that may have been).  As Sam Hardy further highlights the narrative isn’t that clear-cut either as there were a number of different organisations involved during the making and producing of Nazi War Diggers, including Legenda, the company used in the Latvian sequence of the show.  It is pertinent here to include a quote from hardy’s blog entry regarding the Legenda organisation, and those like it, who work in tough environments:

Since there are still war survivors and missing persons as well as mass graves and battlefields in Latvia, Latvians are still living in the aftermath of the conflict. Dealing with survivors’ and relatives’ loved ones as past, as archaeology, is a delicate, painful process.

Being respectfully scientific with fallen soldiers can be experienced by soldiers’ relatives as being disrespectfully clinical. And that pressure is felt by the volunteers who do the work as well as by the archaeologists who cannot secure professional standards of work.” (Hardy 2014, but see here also).

Yet there are still serious questions that remain in the commission of Nazi War Diggers and of the relationship between the television and archaeology in general.  Battles, and battlefields, have long been a staple for re-enactments on historical documentaries on television, yet not many have actively highlighted the excavation of human remains with such abandon as Nazi War Diggers.  Furthermore, there is the very real danger that this show has undermined the credibility of conflict archaeology as an emerging, but important, field in itself.  With the centenary of the First World War upon us, and important archaeological investigations into the sites where the horrors of the holocaust were carried out in the World War Two (see Sturdy Colls 2012 for non-invasive techniques used at the Treblinka camp), this can be seen as particularly insensitive and crass.  Archaeology is not the handmaiden of history, but walks alongside it hand in hand, helping to provide vital physical evidence to the documentary evidence.  A particular problem is further highlighted by Pollard & Banks, which is this:

How did we get to a situation where something like Nazi War Diggers is regarded as a desirable product by a major broadcaster such as National Geographic Television? This is not the place to attempt an answer to this question but we have clearly reached a point where some self-reflection is called for, especially by those of us who have benefitted from our involvement in television.

We can only hope that National Geographic Television’s decision to pull the series means that a change of commissioning policy will be considered, with a return to more responsible programming, which does both television and the practice of archaeology credit.” (Pollard & Banks 2014: 52).

The editorial is an interesting piece and I’d recommend taking the time to read it.  In the meantime myself and other archaeology bloggers will be keen to see what the National Geographic Channel get up to with the footage already shot for the Nazi War Diggers program and whether it comes back, or not, in any shape or form.  The response of many of the bloggers to the show (including myself) has been a reactive reaction to it, decrying it for the lack of care and thought put into the show’s presentation and approach.  However it has undoubtedly raised knowledge of what is a very tangible and emotional remainder of the actual human cost of conflict and war – the survival, exhumation and recovery of the remains of individuals killed in action, whether participating as active soldiers or as civilians.

As Pollard & Banks (2014: 52) highlight we, as active bloggers and specialists in this area, must also engage, educate and help inform both the general public and organisations (including National Geographic Channel) as to what is the appropriate approach when it comes to excavating, analysing, and presenting the remains of humans excavated from both archaeological and historic contexts.  If we don’t more programs, such as Nazi War Diggers, will be produced, which will lead to the decay of contextual information and, ultimately, the loss of knowledge.

Learn More:

Bibliography

Hardy, S. 2014. A Note on the Volunteer Human Rights Exhumers Legenda. Conflict Antiquities. Accessed 30th September 2014.

Pollard, T. & Banks, I. 2014. Editorial. Journal of Conflict Archaeology9 (2): 49-52. (Open Access).

Sturdy Colls, C. 2012. Holocaust Archaeology: Archaeological Approaches to Landscapes of Nazi Genocide and Persecution. Journal of Conflict Archaeology.  7 (2): 70-104.

Osteological and Forensic Books of Interest

23 Sep

I’ve been reading Doug’s latest blog series on archaeological publishing with increasing interest.  I’ve recently ordered a copy of Mary E. Lewis’s 2007 publication The Bioarchaeology of Childhood: Perspectives  from Biological and Forensic Anthropology, and I am very much looking forward to reading it as I am keen to improve my own knowledge of human non-adults, i.e. of juvenile remains.  It has also sadly been a while since I have ordered a new osteology reference book.  This isn’t from a lack of bioarchaeology books that I would like to read, far from it, but it is partially due the cost of buying such copies.  There have been a few recently released books (such as the 2014 Routledge Handbook of the Bioarchaeology of Human Conflict by Knüsel et al. and the 2013 Bioarchaeology: An Integrated Approach to Working with Human Remains by Martin et al.) that I’d love to own for my own collection, but I’m waiting until they come out in paperback as they are rather expensive otherwise.

On this blog I have often mentioned discussed and highlighted the wonders of the fantastic Human Bone Manual (2005) by White & Folkens, of Larsen’s (1997) Bioarchaeology: Interpreting Behaviour from the Human Skeleton reference book, and of Gosling et al.’s (2008) Human Anatomy: Colour  Atlas and Text Book, amongst a few others.  But I haven’t really mentioned other texts that have been especially helpful in piecing together the value of studying and understanding the context of human osteology for me, personally.  The following publications are a collection of reference books and technical manuals that have proved helpful in understanding human and non-human skeletal material, adult and non-adult remains, and on various aspects of forensic science.  I have dipped into some, read others completely – regardless they are of importance and of some use to the human osteologist and osteoarchaeologist.

So without further ado here are a few osteological and forensic themed books that have proved especially helpful to me over the past few years (and hopefully for many more years to come!):

tbom booksss 2

Books covers of the below.

I. Human and Nonhuman Bone Identification: A Colour Atlas. Diane L. France. 2009. Boca Raton: CRC Press.

Aimed at the forensic anthropologist, this concise comparative osteology guide on how to identify human skeletal remains compares and highlights anatomical differences between numerous (largely North American) mammal species (such as seal, cow, mountain sheep, domestic sheep, moose etc.).  This book highlights well the challenges faced in recognising skeletal material in the field, and trying to distinguish whether the remains are human or not.  Organised largely by element from superior to inferior (crania to pedal phalanges) into three sections, each detailing a different theme – 1. General Osteology (which includes gross/anatomy/growth/development), 2. major Bones of Different Animals (which are grouped by bone) and 3. Skeletal Elements of Human and Nonhuman Animals (which includes bones from each species shown together).  This is a great immediate reference to recognising the osteological landmarks of various species.  This book should be of particular importance to forensic anthropologists, osteoarchaeologists and zooarchaeologists.

II. Developmental Juvenile Osteology. Louise Scheuer & Sue Black (illustrations by Angela Christie). 2000. London: Elsevier Academic Press.

At the time of publication this volume was one of the few human osteological books focusing purely on the developmental osteology of juveniles.  Arranged into eleven chapters, the book details an introduction to skeletal development and aging, bone development and ossification, and embryological development before focusing chapters to specific areas of the human body (vertebral column, pectoral girdle, lower limb etc.).  The book is really quite important in understanding the juvenile skeletal, as to the untrained eye juvenile material can look nonhuman.  For any forensic anthropologist, human osteologists, or osteoarchaeologist examining juvenile skeletal material this volume is one of the best publications available in order to recognise and understand the skeletal anatomy that can be present at forensic or archaeological sites.  It is also recommended for field archaeologists who may come across juvenile skeletal material and be unaware of what it exactly is.

III. The Cambridge Encyclopedia of Human Palaeopathology. Arthur C. Aufdeheide & Conrado Rodríguez-Martín (including a dental chapter by Odin Langsjoen). 1998. Cambridge: Cambridge University Press.

A standard reference book in the fields of archaeology, palaeopathology and human osteology, the Cambridge Encyclopedia of Human Palaeopathology presents concise yet detailed descriptions and photographs documenting the variety of diseases and trauma that can affect the human skeleton.  This is a standard reference book that is heavily used in the osteoarchaeological field.  Split into chapters that detail each kind of skeletal lesion, and its recognition, within a type (endocrine disorders, skeletal dysplasia, metabolic disease, trauma, infectious diseases, etc.), the volume describes contextualises each entry with its known history, etiology, epidemiology, geography and antiquity.  Soft tissues diseases that can be found on mummies, or otherwise fleshed bodies from archaeological contexts, are also highlighted and discussed.

IV. Identification of Pathological Conditions in Human Skeletal Remains: Smithsonian Contributions to Anthropology No. 28Donald J. Ortner & Walter G. J. Putschar. 1981. Washington D.C.: Smithsonian Institution Press.

As above, this publication is another standard reference book for identifying pathological conditions in the human skeletal.  The 1981 edition is now slightly out of date regarding the etiology of some of the diseases discussed in this work, but the photographic images depicting the gross osteological change are still reliable.  Regardless this is still a vital book in understanding the development and sheer breadth of palaeopathology as a field in itself.

V. Forensic Taphonomy: The Postmortem Fate of Human Remains. Edited by William D. Haglund & Marcella H. Sorg. 1997. Boca Raton: CRC Press.

Forensic taphonomy,  the study of the processes that affect decomposition, burial and erosion of  bodies, is the focus of this publication.  This edited volume contains chapters discussing a wide range of different aspects of forensic taphonomy.  Split into five sections (1. taphonomy in the forensic context, 2. Modifications of soft tissue, bone, and associated materials, 3. Scavenged remains, 4. Buried and protected remains, 5. Remains in water) the book provides an overall perspective on important issues with pertinent case studies and techniques referenced throughout.

VI. Advances in Forensic Taphonomy: Method, Theory and Archaeological Perspectives. Edited by William D. Haglund & Marcella H. Sorg. 2001. Boca Raton: CRC Press. 

The second volume of the Forensic Taphonomy publication, this updated edition deals more widely with the issues that surround the bioarchaeological perspectives of forensic taphonomy, and how it relates to forensic anthropology.  This version includes chapters focusing on mass graves and their connection to war crimes (archaeological and forensic approaches), understanding the microenvironment surrounding human remains, interpretation of burned remains, updates in geochemical and entomological analysis,  and also highlights the updated field techniques and laboratory analysis.  Again this is another hefty publication and one that I have only dipped in and out of, but it is well worth a read as it can bring new insights into the archaeological contexts of human remains.

VII. Skeletal Trauma: Identification of Injuries Resulting from Human Rights Abuse and Armed Conflict. Edited by Erin H. Kimmerle & José Pablo Baraybar. 2008. Boca Raton: CRC Press.

This publication focuses on human rights violations in conflicts where forensic evidence is to be used in international tribunals.  It highlights a variety of case studies throughout each of the eight chapters from the numerous contributors (including the late Clyde Snow), describing both the protocols for forensic examination in human rights abuse and violations to the specifics of different classes of trauma (blast, blunt force trauma, skeletal evidence of torture, gunfire etc.).  Importantly the first two chapters focus on an epidemiological approach to forensic investigations of abuse and to the differential diagnoses of skeletal injuries that forensic anthropologists should be aware of (congenital or pathological conditions, peri- vs postmortem injuries, normal skeletal variation etc.).

VIII. The Colour Atlas of the Autopsy. Scott A. Wagner. 2004. Boca Raton: CRC Press.

A slight deviation from the curve above perhaps, but this is an informative read on why and how autopsies are carried out.  It also introduces the purpose and philosophy of the autopsy, and then the importance of circumstantial and medical history of the individual.  The book is, after the first chapter, set out in a step by step style of the procedure with numerous images, helping to detail the aim of the autopsy in medical and forensic contexts.  The book also details the different types of trauma that can be inflicted on the human body (blunt force, sharp, projectile, ballistic, etc.) and their telltale signs on flesh.  It is certainly not a book for the faint of heart, but it is informative of modern medical practice, of a procedure that has had a long and somewhat troubled history of acceptance but still remains a decisive procedure in forensic contexts.

tbom booksss

Book covers of the above.

Readings

Although this is just a short selection of publications in the fields of osteology, biological anthropology and forensic anthropology, I hope it gives a quick taste of the many different branches that can make up studying and practicing human osteology.  A few of the publications highlighted above are reference books with chapters by various authors, or are technical manuals, highlighting the step by step techniques and why those methods are used.  A number of the publications above remain standard reference books, while others will of course date somewhat as new techniques and scientific advances come into play (perhaps most evidently in the forensic contexts).  However the core value of the publication will remain as evidence of the advancements in the above fields.

Writing this post has also reminded me that I must join the nearest university library as soon as I can…

Learn From One Another

This is just a snapshot of my own readings and a few of the publications have since been revised.  I’d be happy to hear what readers of this blog, and others like it, have read and recommend in the above fields.  Please feel free to leave a comment below!

Note

The reason that CRC Press appear often in this selection is because the organisation is a recognised publisher of technical manuals in the science fields.

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