Polar vortex: What is it and how does it happen?

The deep freeze gripping much of the US has been blamed on a polar vortex. Here's what that means.

from BBC News - World https://bbc.in/2Sex5LW

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Algerian man found alive in cellar after 26 years

Officials have arrested a 61-year-old man suspected of keeping him prisoner. from BBC News https://ift.tt/C4oiP1X