Tunguska: The 1908 Blast With No Crater

Dawn, June 30, 1908. Over the Tunguska River in Siberia, a fireball brighter than the sun streaked across the sky, followed by a blast equal to a thousand Hiroshima bombs. Over 2,000 square kilometers of forest were flattened — 80 million trees knocked down like matchsticks, all pointing the same wa……