
The investigation of some of the most notorious and mysterious events, in an attempt to unravel all the possible reasons for the disasters.

An unknown tunnel is discovered beneath a Brazilian farm; a wall of molasses floods Boston; the world's first military submarine vanishes despite a successful mission; was it sunk by the enemy? Or by natural forces?

A giant explosion in Siberia flattens millions of trees; a flood comes out of nowhere to destroy an English town; defeat is snatched from the jaws of victory at Gettysburg, Pa.; poor leadership? Or a quirk of nature?