Anth_Hist

Anth_Hist - Anthropology2050 16:28 Anthropology2050 1/21/11...

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Anthropology 2050 16:28 Anthropology 2050 1/21/11 Human Origins Robust vs. gracile australopithecines Evolution Setting for early human ancestors: Africa Early Hominins: our family tree (in a nutshell)  Evolution Biological Cultural Technological Variation Adaptation Selection Change Darwin’s Evolution: Concept of Natural Selection Individuals within species vary
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Some variations are passed to offspring More offspring are produced than can survive Survival and reproduction not random Variations more suited often survive to reproduce or reproduce more Evolution: Biological/cultural adaptation Biological evolution by natural selection o Polar bear’s fur is thick and they are fat to protect from cold Cultural adaptation o Our technological skills advanced so that we could settle in places that  were too cold/hot. Culture Culture is out non-biological means of adapting to our natural and social  environment Tools, Clothing, Language, Writing 1/24/11 Evolution: Common decent Every organism descend from a common ancestor For a long time, it was thought that we were primates and we descended from  primates. We tried to argue with biblical facts vs. millions of years Our past is very complex. So many species to be able to link our ancestry. 
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Hominin refers to all the great apes after the split of our species. o Split- 7 million years ago We start to have good evidence around 4 million years ago o See complexity of our lineage Skulls Present- whether or not we have genetic exchange with Neanderthals 100,000 years ago 1 million years ago 2 million years ago- huge muscles for chewing things, stone tools 3 million years ago 4 million years ago We are primates and part of the great apes Orangutan- 12-15 myr Gorilla- 6-8 myr Human- 4-6 myr Chimpanzees  According to evidence, orangutan existed first Sex is used to resolve conflict
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What do we share with other primates? Thumbs Larger brains Senses  o 3D vision because our eyes are in front of us Flexible shoulder joints, vertical positioning of trunk Hands and feet with 5 digits Flat fingernails instead of claws Generalized dentition Extended gestation and maturation Strong maternal-offspring bond- only one child at a time, not big litters High degree of socialization  What do we have that is different from other primates? Signaling- signal to potential mates
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This note was uploaded on 05/07/2011 for the course ANTH 2050 taught by Professor Staff during the Spring '08 term at LSU.

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Anth_Hist - Anthropology2050 16:28 Anthropology2050 1/21/11...

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