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"Asteroids and meteors have been much in the news recently, with an exploding meteor injuring hundreds in Russia and an asteroid making a close fly-by of the Earth, both on Friday."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.upi.com/Science_News/2013/02/17/Earth-bears-evidence-of-cosmic-impacts-both-ancient-and-more-recent/UPI-43871361100660/>