How the last mammoths went extinct
Small genetic mutations accumulated through inbreeding may have made them vulnerable to disease
The woolly mammoths of Wrangel island were survivors. Trapped on a hunk of rock in the Arctic Ocean after rising sea levels cut them off from present-day Siberia, they were the last of their species to go extinct. Palaeontology textbooks have explained their eventual demise around 4,000 years ago as a classic case of extinction through inbreeding, in which severely damaging genetic mutations spread through an isolated population and kill it off. New work published in Cell , a journal, on June 27th reveals that the textbooks are wrong.
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