More On The Mysterious Tunguska Explosion of 1908

On June 30 of 1908, the remote Tunguska region of Siberia was rocked by a horrific explosion of then mysterious origin, one that was powerful enough to cause a 60+ mile radius of unbelievable destruction (equivalent to that of a 50-60 megaton thermonuclear bomb!), flattening trees and completely scorching the ground. Many theories have abounded about what it was, some quite beliveable (2-story house sized comet fragment or meteorite blowing apart before it could reach the ground), to the preposterous (alien spacecraft crash, superweapon of alien origin, a small black hole/singularity).

Just found this article by way of Space.com on how a team of scientists have revisited this mystery and turned up new findings that may once and for all explain what happened. Their line of thinking is that a lake about 5 miles from what is believed to be the epicenter of the blast may well be the impact/blast crater they've been looking for:

http://www.space.com/scienceastronomy/070626_st_tunguska_crater.html


http://en.wikipedia.org/wiki/Tunguska_explosion