What Really Caused the 1908 Explosion in Tunguska?
UFO crash landings, death rays, and other wild hypotheses.

On June 30, 1908, an explosion occurred deep within the Siberian forests that sent shockwaves throughout Europe. A man 40 miles (64 kilometers) from the center of the explosion was thrown out of his chair and described feeling like his body was on fire. Windows were shattered for…