By ZACH ZORICH
Thursday, February 28, 2013
Analysis of 210 stone tools from the site of
Kathu Pan in South Africa
shows that people were probably hunting with stone-tipped spears by about
460,000 years ago, roughly 200,000 years earlier than previously believed. The
study, led by University
of Toronto doctoral
candidate Jayne Wilkins, confirmed that the tools had broken in ways similar to
other stone spear points that have been thrust or thrown into the bodies of
animals. In addition, 23 of the tools appear to have been thinned at their
bases to make them easier to attach to the shaft of a spear. To test their
interpretation, the team made 32 replicas of the tools from Kathu Pan, hafted
them to wooden dowels, and fired them into springbok carcasses using a crossbow
that allowed for precise control of force. The replica spear points were
damaged in ways similar to their ancient counterparts. The early date for the
tools also suggests that the first stone-tipped spears were used by Homo
heidelbergensis, the species of human that was the ancestor of both
Neanderthals and modern humans.
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