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Media in a spin over polar vortex
Polar vortex didn't freeze Moos' funny bone
The "Polar Vortex" pays a visit
What Is A Polar Vortex?
Watch: Boiling water turn into Ice amid Polar Vortex in US
Bye-Bye Polar Vortex!
Polar vortex cold enough to turn boiling water into ice in the air
What polar vortex split means for our winter
'Polar Vortex' Explained By Al Roker | Debunker | NBC News
Five icy videos from the heart of the polar vortex
What You Need To Know About The Polar Vortex | TIME
US Slowly Thaws, Polar Vortex Leaves Mark
