ANTH 196 Lecture Notes - Lecture 19: Mary Leakey, Paranthropus, Pelvis
Document Summary
Sahelanthropus: the brain size was still relatively small because bipedality was the first to evolve before the increase in brain size. Brain size measurements around 400cm are considered chimp-like . There is an older hominin under the genus australopithecus before a. afarensis by the. East africa: includes kenya, tanzania, and ethiopia name of a. anamensis, but it is not as major and not necessary to know for the exam. Darwin"s hypothesis on why bipedalism evolved - it evolved so that hands could be free to hold things and for tool use/creation. This was later found to be wrong because tools came after bipedality. Less sun exposure on the back b/c of upright posture. Increased height above the ground resulted in better exposure to breezes/wind. Male provisioned food for female (mate) and offspring. This trait/ability was more of a determining factor for mating rather than fighting and/or physical appearance (sexual selection) Evolution of bipedalism part ii: early definite bipeds.
