Biggest explosion in documented history is still a mystery


More than 100 years ago, a massive explosion ripped through the sky over the Tunguska region of Siberia, flattening trees nearly 31 miles around.

The blast is thought to have been produced by a comet or asteroid hurtling through Earth’s atmosphere at over 33,500 miles per hour, resulting in an explosion equal to 185 Hiroshima bombs as pressure and heat rapidly increased.