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It's cold right now. Okay, fine, here on Vancouver Island, it's
actually pretty warm. But for the rest of Canada and big parts of
the US, it's terrifyingly cold. Colder than Mars or the North
Pole cold. This is all thanks to the break up of the polar
vortex. What are polar vertices, how do they form, and where else
to we find them in the Solar System?

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