In 1908, in the middle of the Siberian wilderness, near the Tunguska River, an explosion took place which was the equivalent in size to the detonation of a 5 megaton nuclear bomb.

But it wasn't a nuclear bomb. Such things didn't even exist then. It was a mystery that scientists are still trying to figure out today.

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On June 30th, 1908, at around 717 a.m. local time the Earth witnessed one of the largest

explosions in recorded human history. The explosion occurred in the remote

forests of Siberia near the Padkemanaya Tunguska River.

Forty kilometers away from ground zero was the small community of Vanavara.

This was the closest human settlement to what was the center of the explosion.

One man sitting on a porch was blown off his chair with intense heat

which felt as if his clothes was on fire.

Despite the magnitude of the explosion,

it isn't believed that there were any direct casualties from the blast

due to a remoteness.

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