Add Yahoo as a preferred source to see more of our stories on Google. In an early sign of the winter weather that's coming, the dreaded polar vortex is making news yet again. The polar vortex is ...
Frigid wind chills of -50 degrees and lower hit parts of the Midwest early this week – with some seeing high temperatures below 0 – all thanks to the polar vortex. But, what the heck is the polar ...
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