Image: A artist's rendering of the probable life appearance and skeleton of Ardipithecus ramidus, aka "Ardi" (c) 2009, J.H. MatternesFrom Time Magazine:
Figuring out the story of human origins is like assembling a huge, complicated jigsaw puzzle that has lost most of its pieces. Many will never be found, and those that do turn up are sometimes hard to place. Every so often, though, fossil hunters stumble upon a discovery that fills in a big chunk of the puzzle all at once — and simultaneously reshapes the very picture they thought they were building.
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