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Welcome to Cool Stuff Daily.

I'm Regger-R-Zoo, and sometimes, you know, the coolest

science stories out there aren't about rockets or robots. They're about unexpected kindness in the wild.

Today's Cool Stuff Daily takes you to the frozen edges of northern Canada where researchers

spotted something so rare it's only happened about

a dozen times before. And it involves a polar bear mom with an extra cub and an oversized

heart. Researchers tracking polar bears in western Hudson Bay near Churchill, Manitoba have documented

an exceedingly rare event, a wild polar bear mother adopting a cub that is not

biologically her own. The mother bear, a five-year-old female known to scientist as X33991,

I don't know why we can't just give her a name like Paula or something, but anyways, she was

spotted emerging from her maternity den in March in

Wapestan National Park in northeastern Manitoba. At the time, she had one cub, which researchers

fitted with an ear tag for long-term study. Fast forward to mid-November, during the annual

polar bear migration along the Hudson Bay coastline, scientists did a double take.

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