Fig. 3From: Archaeology and Human EvolutionStone tools. a Clovis point, Dent Site, Colorado, approximately 13,000 years old (after Whittaker [1994]). b Front and side views of an Acheulian hand axe, Refuf Pass, Egypt, approximately 350,000 years old (after Coles and Higgs [1969]). Both artifacts redrawn by Christopher ColemanBack to article page