jan 1, 4200000 BC - Australopithecus anamensis. Lake Turkana, Kenya

Description:

Ardipithecus ramidus was first reported in 1994; in 2009, scientists announced a partial skeleton, nicknamed ‘Ardi’. The foot bones in this skeleton indicate a divergent large toe combined with a rigid foot – it's still unclear what this means concerning bipedal behavior. The pelvis, reconstructed from a crushed specimen, is said to show adaptations that combine tree-climbing and bipedal activity. The discoverers argue that the ‘Ardi’ skeleton reflects a human-African ape common ancestor that was not chimpanzee-like.
Read more:
http://humanorigins.si.edu/evidence/human-fossils/species/ardipithecus-ramidus

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