Chapter 20: Human Evolution

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Chapter 20 Human Evolution

• - How do humans differ from closely related
  species?

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Hominids

• Upright walking primates (includes monkeys, apes,
  humans)
• Earliest hominids lived in Africa originated 4
  million years ago

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Lucy

• Australopithecus Afaraensis
• One of earliest hominid fossils found (3.2
  million years old)
• Scientists learned that bipedalism (walking on 2
  feet) evolved in humans before a larger brain (so
  walking occurred before intelligence)

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Bipedalism