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alan fitzsimmons, Tag
- Astrophysicist warns asteroid strike is not a matter of if, but when Thu, 22 Jun 17, 11:10pmWe humans have done a pretty good job of trashing the Earth all by ourselves, but we don't often stop to consider external threats - like asteroids. A 1908 asteroid explosion over Tunguska, Siberia ravaged 800 square miles,...