martes, 24 de mayo de 2011

Mystery of Russia

The Tunguska Explosion of Russia
The Tunguska Explosion in Russia occurred around 7:14 a.m. on June 30, 1908. To this date, the exact cause of the explosion – which leveled 80 million trees over 830 square miles – remains a heated debate. Most believe it to be caused by a meteoroid fragment, others insist either a black hole or UFO origin.

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