What Really Caused the 1908 Explosion in Tunguska?

UFO crash landings, death rays, and other wild hypotheses.

A photo documenting the aftermath of the Tunguska event. The photo shows many felled trees in the Siberian forest caused by the explosion.
A photo documenting the aftermath of the Tunguska event. Source: Евгений Леонидович Кринов (member of the expedition to the Tunguska event in 1929), via Wikimedia Commons.

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…

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