http://www.popsci.com/how-big-would-meteorite-have-be-wipe-out-all-human-life?con=TrueAnthem&dom=tw&src=SOC&utm_campaign=&utm_content=57eb0f0904d3012c85b5d052&utm_medium=&utm_source=
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Tuesday, September 27, 2016
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