Woolly mammoths once flourished from northern Europe to Siberia. As the last ice age drew to a close some 10,000 years ago, the mainland population perished, victims of climate change and human hunters.
However, a remote island population survived for 6000 years after the mainland had died off. And from a tooth of a male mammoth, geneticists have now deciphered the reason the population ultimately went extinct.
Read about it in the New York Times.