7. An explosion with a perplexing cause
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Extraordinary moments in history like this one can leave lasting scars. Pictured here is the explosion site from the Tunguska event that took place there 100 years before this photograph. In what is known as one of the most extraordinary moments in history, a mysterious column of blue light moved thru the sky over Russia. Later a sound that sounded like a war breaking out swept thru the town just before a shockwave hit and knocked people on the ground. A cause was never determined, however scientists say it had to have been as powerful as the atomic bomb.
