Asteroid Busting

Bethesda MD (SPX) Feb 08, 2011 Imagine it is June 30, 1908 and you are in Siberia. The time is just after seven in the morning. Suddenly a pressure wave knocks you off your feet and a few moments later a blast of heat is so intense that you think your shirt is on fire. This is what a witness felt some 40 miles away from ground zero in the Tunguska event, over 100 years ago. This is the only recorded entry of a large natural s


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