Politics & Government

February 12, 2009 4:14 PM

How broken arm led scientists to genome of Neanderthals

About 38,000 years ago, a Neanderthal man living in what's now Croatia broke his left arm, forcing him to use his other arm for most tasks. That increased the mass and density of the bone in the upper right arm, and preserved his DNA for researchers — using a dentist's drill — to recover many millennia later.

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