Evidence For Human Evolution

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Ardi

  • 4.4 million years old
  • Found in Ethiopia
  • Structure of her feet suggests she climbed trees - she had an ape-like big toe to grasp branches
  • Long arms and short legs
  • Similar brain size to a chimpanzee
  • Walked upright and didn't use her hands to walk

Ardi (http://www.scientificamerican.com/media/inline/ardi-hominid-human-ancestor_1.jpg)

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Lucy

  • 3.2 million years old
  • Found in Ethiopia
  • Arched feet, more adapted to walking than climbing. No ape-like big toe
  • Arm and leg size is between that of human and apes
  • Brain size is larger than Ardi's - similar to a chimp
  • Leg bones and feet suggest she walked upright, but more efficiently than Ardi

Lucy (http://www.nhm.ac.uk/resources-rx/images/1008/afarensis-headshot-109039-1.jpg)

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Leaky's Findings (Turkana Boy - Homo erectus)

  • 1.6 million years old
  • Short arms and Legs are much more human
  • Bain size much larger than Lucy's - similar to Humans
  • Structure of legs and feet suggest he was even better adapted to walking upright than Lucy

Turkana BOy (http://media-3.web.britannica.com/eb-media/38/79538-004-F996FC7F.jpg)

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