mardi 7 janvier 2014

Just what is a 'polar vortex'?

BRRRR. It's cold in America - like minus 60 degrees cold. And it's all thanks to this weird thing called a polar vortex. So what is it?



via NEWS.com.au | Technology News http://www.news.com.au/technology/environment/baby-its-cold-outside-heres-everything-you-need-to-know-about-americas-polar-vortex/story-e6frflp0-1226797012322?from=public_rss

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