class_6_2010_for_web - IB35 Human Biological Variation...

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1 IB35 Human Biological Variation Class #6 Topic for today: The origin & diaspora of Homo sapiens Models for the origin of H. sapiens : • Candelabra • Replacement (Out of Africa) H. sapiens frica Europ sia E. Euro H. sapiens TIME H. erectus e pe H. erectus Candelabra Model • Problems with this model: – Evolutionarily unrealistic – Argues for directionality in evolution Models for the origin of H. sapiens : No relationship Same thing, but evolving A continuum rather than a dichotomy… La Sima de los Huesos Atapuerca • 400,000 years ago • “The pit of bones” The Neanderthals El i t K i Earliest = Krapina, Croatia (~130kya) Latest = Zafarraya in southeastern Spain (30kya)
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2 Bodo, Ethiopia 500,000 years ago Earliest fossils of H. sapiens Herto, Ethiopia – 160 kya – Predates Neanderthals – Probably represents the immediate ancestors of anatomically modern humans Ethiopia 160,000 years ago South Africa 90,000 years ago Evidence for Homo sapiens in the Old World Israel 90,000 years ago Australia 40,000 years ago Asia* 35,000 years ago Europe* 32,000 years ago Africa after Herto
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class_6_2010_for_web - IB35 Human Biological Variation...

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