Class 5 - Human Diaspora

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Department
Integrative Biology
Course
INTEGBI 35AC
Professor
Leslea Hlusko
Semester
Fall

Description
9/12/13  Homo erectus  homo sapien  Brain size o 400 cc: chimps ardipithecus, austrlopithecus o 600-900 cc: early homo erectus o 1000 cc: later homo erectus o 1,100 cc: modern human The Evidence • DNA – Living people – Dead people • Fossils Wh th f d • And to make it even more complicated, the geography has changed over time due to climate change – Where they are found – Their geologic age – What they look like • Artifacts – Where they are found – Their geologic age – What they look like due to climate change ( The transition from H. erectus to H. sapiens • We do know it happened, but the details are debated. • Possible models: – C dlbaneara Largely based on fossils, idea from the 1960s – Multiregionalism Largely based on fossils, idea from the 1980s – Replacement – A Little Introgression Largely based on mtDNA, idea from the 1980s, 1990s New idea based on ancient nuclear DNA  Candelabra o Homo erectus  move out around the world  then homo sapien  Explains cultural variation, develop at different rates (Social Darwinism?)  NOT TRUE – how could all the humans end up evolving into the same thing, evolve in the same direction?, unrealistic o Lauring Brace  Multiregional Hypothesis o Homo erectus  move out around the world  then homo sapien  BUT have enough gene flow between different groups o Milfred Wallcoff  Replacement o Homo erectus  move out around the world  then homo sapien evolved in Africa and dispersed to replace erectus  Introgression o Disperse and mix  Georgia – skull  Spain – rock tools (1.7 mya), skull (800,000), hand ax with specific look (300,000-400,000), cave with burial?  Germany – mandible (500,000 years ago), spear (400,000 years ago)  Neanderthals o 130,000 years ago – 30kya in spain o 1856 o Weird guy o Homo neanderthalensis – living in moral darkness? – William King  Other species? o Neanderthals vs modern  Brow ridges, larger brain, rounder eye orbits, wider nose, skull stick out from back, big face that sticks out, shorter forearms,
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