Russian meteor's origin remains mysterious 2 years later

February 16, 2015 5:15 PM

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Russian meteor's origin remains mysterious 2 years later

Trail of the asteroid that exploded over Chelyabinsk, Russia, on Feb. 15, 2013. (Alex Alishevskikh CC BY-SA 2.0 via http://www.flickr.com/photos/alexeya/)

Two years after an asteroid exploded over Russia and injured more than 1,200 people, the origin of the space rock still puzzles scientists.

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