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SI - Site Forums : The Un-Welcomed
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From: Cheeky Kid5/7/2009 1:15:42 PM
of 345
 
When Comets Attack: Solving the Mystery of the Biggest Natural Explosion in Modern History
popularmechanics.com


Snip:
On the morning of June 30, 1908, the sky exploded over a remote region of central Siberia. A fireball as powerful as hundreds of Hiroshima atomic blasts scorched through the upper atmosphere "as if there was a second sun," according to one eyewitness. Scientists today think a small fragment of a comet or asteroid caused the "Tunguska event," so named for the Tunguska river nearby. No one knows for certain, however, because no fragment of the meteoroid has ever been found. The explosion was so vast—flattening and incinerating over an 800 square-mile swath of trees—that generations of amateur sleuths have put forward scenarios as strange as stray black holes or UFO attacks to explain the tremendous explosion.
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