Why a Comet Left No Crater

Thursday, December 20th, 2007

When, on 30 June, 1908, a mysterious explosion flattened around half a million acres of forest near the Podkamennay Tunguska River in central Siberia, Russia, the blast could be heard up to 500 miles away and eyewitnesses reported seeing a shining object in the sky, moving toward the earth. What caused the explosion and why […]