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Fossil evidence of Human Evolution 17. pp.324-326

Fossil evidence of Human Evolution 17. pp.324-326. Earliest Evidence of Human Ancestors Central Africa about 3 million years ago Not a human but Walked upright About 4 feet tall Brain smaller than human Most famous is “Lucy ” Australopithecus afarensis Brain about 475 cm 3

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Fossil evidence of Human Evolution 17. pp.324-326

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  1. Fossil evidence of Human Evolution 17. pp.324-326 Earliest Evidence of Human Ancestors • Central Africa about 3 million years ago • Not a human but • Walked upright • About 4 feet tall • Brain smaller than human • Most famous is “Lucy” • Australopithecus afarensis • Brain about 475 cm3 • Human about 1400 cm3

  2. Fossil evidence of Human Evolution 17. pp.324-326 Other Fossils give a picture of human evolution Australopithecines = species in the genus Australopithecus • A. africanus: 2-3 mya, brain 430-550 cm3 • A. robustus: 1-2.6 mya, brain 450-600 cm3 • A. boisei: 1-2.6 mya, brain 450-600 cm3 Australopithecines probably not direct ancestors of humans

  3. Fossil evidence of Human Evolution 17. pp.324-326 Genus Homo: • Homo habilis: “handy human” • Homo erectus: “ upright human” • Homo sapiens: “thinking human”

  4. Fossil evidence of Human Evolution 17. pp.324-326

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