Photo: Ancient Jawbone Could Shake Up Fossil Record

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An ancient jawbone, above, was recently found in Africa's fossil-rich Afar region, just 20 miles (32 kilometers) north of the spot where the famed skeleton of "Lucy," an early human ancestor, was unearthed in 1974.


The bone, which is at least 3.5 million years old, may spark further debate about how many types of human ancestors roamed East Africa at once.

Photograph courtesy Cleveland Museum of Natural History/Handout/REUTERS

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