http://www.redorbit.com/news/science/11 ... ry-081012/
http://www.aftau.org/site/News2?page=Ne ... e&id=17065
From the news page.
So, maybe all those “scrapers” were not for cleaning hides as much as for shaping wood?
It reminds me of the changes in the use of metal.
Each step from copper to bronze to iron required technology steps to attain a whole new level of temp.