coolartefact:

[OS] Flint arrowhead embedded in an upper arm bone. From the battle at Tollense River, Germany. 1250 BC [850×638]

Source: http://www.sciencemag.org/sites/default/files/styles/inline_colwidth__4_3/public/images/Abb.%2002.jpg?itok=AmNnab69&timestamp=1458673112