DNA reveals polar bear’s ancient origins

The polar bear is much older than previously thought, according to new genetic evidence.

DNA studies suggest the Arctic predator split from its ancestor, the brown bear, about 600,000 years ago.

Previous estimates put the polar bear at about 150,000 years old, suggesting the mammal adapted very rapidly to Arctic life.

Conservationists say the new study, published in Science, has implications for bear conservation — via redwolf.newsvine.com

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