14-37 - Anthropology lecture notes 13.4.09 Modern humans...

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Anthropology lecture notes 13.4.09 Modern humans What happened to archaic? o After about 100,000 years ago modern humans start spreading from Africa o By about 40,000 years ago modern humans inhabit most of the old world o Last evidence for Neanderthals – about 30-25,000 years ago H. sapiens vs. H. Neanderthals o Interbreeding? o Predation? o Climate change? o All of the above? Transformation to modern Homo Reduced robustness – everything gets smaller Back teeth continue to reduce, so do front teeth Cranial buttresses much less in evidence o Loss of brow ridge o Development of chin Sexual dimorphism reduces to modern levels Causes: o Food processing – reduced selection for large molars o With modern humans, first projectile weapons Atlatl (spear thrower) No close quarter killing of big game o Selection reduced for maintaining big bones
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o Sex. Dimorphism: males get smaller Our gene pool is much less divers than any other animal
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This note was uploaded on 04/18/2011 for the course ANTH 105 taught by Professor Tankosic during the Winter '09 term at Indiana.

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14-37 - Anthropology lecture notes 13.4.09 Modern humans...

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