DNA taken from a pinkie bone at least 30,000 years old is hinting at the existence of a previously unknown population of ancient humans. It's just the latest example of how modern genetic techniques are transforming the world of anthropology.
The pinkie bone in question was unearthed in 2008 from what's called the Denisova Cave.
"The Denisova Cave is in southern Siberia in the Altai Mountains in central Asia," says David Reich, a geneticist at Harvard Medical School in Boston. "This bone is the bone of a 6- to 7-year-old girl."
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