12_oldowan_toolmakers_and_the_origin_of_human_life_history

12_oldowan_toolmakers_and_the_origin_of_human_life_history...

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How Humans Evolved Chapter 12: Oldowan Toolmakers and the Origin of Human Life History W. W. Norton & Company © 2009
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b Dated from 2.5 mya b Earliest tools found in the Awash River basin of Ethiopia
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b Oldowan/Mode 1 technology s Core and flakes s Hammer stones s Choppers b Unknown which hominin was responsible
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b Because Oldowan toolmakers probably were human relatives, paleontologists and anthropologists can learn much about the factors that effected human evolution by studying Oldowan archaeological sites
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b Three types of foraged food (in increasing acquisition order difficulty) : s Collected s Extracted s Hunted b Various hard-to-learn skills are necessary for procuring food.
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chimp human s Collected 96% 10% s Extracted 4% 30% s Hunted 2% 60% chimps: unprocessed ( e . g ., leaves, fruit) humans: processed ( e . g ., tubers)
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b Hunting and extractive foraging lead to: s Food sharing s Division of labor these lead to extensive food flow among different ages and genders b Complex foraging methods could have been helped by the evolution of: s Larger brains s Prolonged juvenile dependence s Longer life spans
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This note was uploaded on 10/02/2011 for the course BIO 1mo3 taught by Professor Rock during the Spring '11 term at McMaster University.

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12_oldowan_toolmakers_and_the_origin_of_human_life_history...

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