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

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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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Canada's air force has been called in to a tiny community in northern Manitoba, where two teens suspected of three murders were thought to have been last seen, police said on Monday, as the chase entered a second week. Kam McLeod, 19, and Bryer Schmegelsky, 18, were believed to have been seen on Sunday outside York Landing, a First Nations community of less than 500 people, 90 km (56 miles) south of Gillam, Manitoba, where search efforts were previously concentrated. The Royal Canadian Mounted Police (RCMP) in Manitoba posted on Twitter that they have not been able to substantiate the tip "after a thorough & exhaustive search," but that resources will remain in the York Landing and Gillum areas. from Yahoo News - Latest News & Headlines https://ift.tt/2yy6y0J
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