ANTH 2231 Lecture Notes - Thermoregulation, Quadrupedalism, Bipedalism
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Aferensis have shown this trait (~after 4 mya) Natural selection dominant form of locomotion. Lots of carnivores in africa = dangerous. Our skeleton evolved from the quadrupedalism to bipedalism. Skelton like a suspension bridge: 2 front legs and back legs and the suspension backbone, good for carrying weight. We know that chimps make simple stone tools. Chimps use rocks and sticks as tools. If you look at us in particular, we have got the most precise grips. Not likely to be a by product of evolution. Males provisioning females (o. lovejoy and h. fisher) For years it was thought that forests shrank, to be replaced by open savannah, around the time bipedalism emerged among early hominins. Provide advantage on the exposure of the sun. Expose less body surface area to direct sunlight. Move your body higher up so it"s cooler (above a meter: more air movement.