They were visitor favorites at San Diego Zoo, where they lived for well more than two decades. Kalluk, a 24-year-old polar bear, had arrived after he’d been orphaned as a cub. And Nicky, a 28-year-old ...
Polar bears are the poster children of climate change—and for good reason. These giant bears hunt, mate and spend their days hanging out on Arctic sea ice, which is rapidly disappearing as the climate ...
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