ANTH 101 Study Guide - Final Guide: Sahelanthropus, Ardi, Bipedalism
Document Summary
When did we start becoming human? (more of an opinion question than a cookie-cutter answer) It all started with chad, aka sahelanthropus tchadensis. Only found partial skeleton-scientists don"t know this species exact size. Large, long arms that went almost past her knees. *the savannah hypothesis says we evolved to walk on two feet because of climate change (forests replaced by savannahs) Ardi contradicts this theory because this species still had long arms and was able to climb trees just as naturally as they can walk. Similar leg, hip and feet bones as us. Some researchers say she died from falling out of a tree; her wounds can be explained by a number of other factors-we don"t know how this particular set of remains died. Evidence of tool use found in ethiopia, dating back 3. 4 million years ago. Tool use shows the ability of a species to plan and imagine. Stone tools were used for cutting and possibly as weapons.
