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The Tunguska Fireball: Solving One of the Great Mysteries of the 20th Century

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On 30th June 1908 a mysterious fireball exploded in the Siberian sky and flattened 2000 square kilometres of the remote Tunguska forest. As no crater and no material from outer space were ever found, a meteorite could not have caused this explosion. so what did? This book discusses all theories and then analyses the evidence.

The so-called Tunguska event has been part of the folklore of science since 1927, when Leonid Kulik became the first scientist to visit the explosion site. He saw an oval plateau 70 kilometres wide where the forest had been flattened. Trees were not uprooted: instead they were stripped of their branches, snapped off and scattered like matchsticks pointing away from the direction of the blast. Even after a careful search Kulik found no crater or other evidence of impact. He searched for meteorite fragments but found nothing. As there was no impact crater and no substantial remnants, a giant meteorite could not have caused the Tunguska explosion. If it were not a meteorite, then what caused the explosion?

The search for the answer to this question has generated a Tunguska industry that has kept both scientists and charlatans busy for eight decades.
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