CANADA: New analysis of ancient DNA has found that mammoths and giant sloths succumbed to sudden, rapid warming events, a finding that has implications for wildlife in a warming world.
The mystery around the disappearance of some of Earth’s largest animals – “megafauna” like mammoths, giant sloths, and mastodons – has long confounded and fascinated scientists.
For several decades, the leading theory pointed the finger at ancient humans living 50,000 years ago, who may have hunted the animals to the point of extinction. Other theories suggested that climatic shifts and sudden cold snaps may have played a role in the disappearance of the giant mammals.
A new study suggests that rapid warming – not human activity – may be the primary cause of the extinction of megafauna during the last Ice Age about 60,000 years ago, known as the Pleistocene.
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