L48 Anthro 150A Lecture 29: HE 11.09.18
Document Summary
11. 09. 09 going to act on all traits at the same time. ~foreamen magnum: where spinal cord comes out the head. +angle of foramen magnum can indicate direction of the spine and that may indicate bipedalism. ~defining features from other apes = bipedalism (bowl-shaped pelvis), small canines, increased cranial capacity, culture (stone tools, fire, art, etc. ), language, ecological flexibility early hominin (homonid) evolution. *hominin: humans and their ancestors since their split from apes and other primates (~ 6 million years ago) *mosaic evolution: one trait changes, then another trait changes evolutionary pressure shaping traits are not. *spinal cord would have straight down rather than outwards. Key features no strong evidence; might not be early hominin. +femur evidence lot of stress on the femoral neck from body weight creates thickness. +orrorin femur is very similar to human femur thickness. *small compared to chimpanzees, but big relative to humans.
