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Love in the time of climate change: Grizzlies and polar bears are now mating

Love in the time of climate change: Grizzlies and polar bears are now mating

Most Alaskans and Canadians have a bear story -- tales of fearsome grizzlies, even polar bears. But a mix of the two?

They're known as pizzlies or grolars, and they're a fusion of the Arctic white bear and their brown cousins. It's a blend that's been turning up more and more in parts of Alaska and Western Canada.

Bears sharing both species' DNA have been recorded several times over the past decade. So why are these two species linking up?

It's called flexible mate choice: The bears are mating with the best possible partners as opposed to not mating at all, and they're mating because they share relatively close territories and the same branches of the same evolutionary...

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