ScienceJournal4Kids
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http://sciencejournalforkids.org 15-09-2015 04:14:50
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Did you know that a weakened polar vortex (a band of strong winds above the North or South Poles) can lead to extremely cold weather & snow in other places? But what can cause a weak polar vortex? Find out what Mostafa Hamouda & other researchers learned: sciencejournalforkids.org/articles/how-c…
