Archaeology Articles and Books
53
The latest research in archaeology and related subjects - exciting and engaging
Curated by David Connolly
Follow
Scooped by David Connolly onto Archaeology Articles and Books
Scoop.it!

SPLASHCOS: Submerged Prehistoric Archaeology and Landscapes of the Continental Shel

SPLASHCOS: Submerged Prehistoric Archaeology and Landscapes of the Continental Shel | Archaeology Articles and Books | Scoop.it

For most of human history on this planet—about 90 per cent of the time—sea levels have been substantially lower than at present, exposing large tracts of territory for human settlement.

 

Europe alone would have had a land area increased by 40 per cent at the maximum sea level regression (Figure 1). Although this has been recognised for many decades, archaeologists have resisted embracing its full implications, barely accepting that most evidence of Palaeolithic marine exploitation must by definition be invisible, believing that nothing has survived or can be found on the seabed, and preferring instead to emphasise the opportunities afforded by lower sea level for improved terrestrial dispersal across land bridges and narrowed sea channels.

 

In the past decade, opinions have begun to change in response to a number of factors: evidence that marine exploitation and seafaring have a much deeper history in the Pleistocene than previously recognised; the steady accumulation of new underwater Stone Age sites and materials, amounting now to over 3000 in Europe, and often with unusual and spectacular conditions of preservation (Figure 2); availability of new technologies and research strategies for underwater exploration; and the growth of targeted underwater research (Erlandson 2001; Bailey & Milner 2002; Anderson et al. 2010; Benjamin et al. 2011).

No comment yet.
David Connolly is also curating
Archaeology News Archaeology Tools
Discover Topics David Connolly is following
All Geeks Kiosque du monde : A la une Kiosque du monde : Asie Kiosque du monde : Océanie Urban Exploration Ancient Civilizations
and 23 others
Your new post is loading...
Scooped by David Connolly
Scoop.it!

PLoS ONE: Neandertal Humeri May Reflect Adaptation to Scraping Tasks, but Not Spear Thrusting

PLoS ONE: Neandertal Humeri May Reflect Adaptation to Scraping Tasks, but Not Spear Thrusting | Archaeology Articles and Books | Scoop.it
Unique compared with recent and prehistoric Homo sapiens, Neandertal humeri are characterised by a pronounced right-dominant bilateral strength asymmetry and an anteroposteriorly strengthened diaphyseal shape. Remodeling in response to asymmetric forces imposed during regular underhanded spear thrusting is the most influential explanatory hypothesis. The core tenet of the “Spear Thrusting Hypothesis”, that underhand thrusting requires greater muscle activity on the right side of the body compared to the left, remains untested. It is unclear whether alternative subsistence behaviours, such as hide processing, might better explain this morphology. To test this, electromyography was used to measure muscle activity at the primary movers of the humerus (pectoralis major (PM), anterior (AD) and posterior deltoid (PD)) during three distinct spear-thrusting tasks and four separate scraping tasks. Contrary to predictions, maximum muscle activity (MAX) and total muscle activity (TOT) were significantly higher (all values, p<.05) at the left (non-dominant) AD, PD and PM compared to the right side of the body during spear thrusting tasks. Thus, the muscle activity required during underhanded spearing tasks does not lend itself to explaining the pronounced right dominant strength asymmetry found in Neandertal humeri. In contrast, during the performance of all three unimanual scraping tasks, right side MAX and TOT were significantly greater at the AD (all values, p<.01) and PM (all values, p<.02) compared to the left. The consistency of the results provides evidence that scraping activities, such as hide preparation, may be a key behaviour in determining the unusual pattern of Neandertal arm morphology. Overall, these results yield important insight into the Neandertal behavioural repertoire that aided survival throughout Pleistocene Eurasia.
No comment yet.