Episode 075 - In the summer of 1908 a huge explosion levelled over 2000 square kilometres in Siberia. The event happened near the remote Tunguska river. It created the loudest sound ever heard by human ears and was visible through Europe and Asia. Locals reported seeing a large fireball rumbling across the sky before the blast. To this day, almost 111 years later, the exact cause of Tunguska Event remains a mystery.

Sources:
Russian Site on the Event - photos, investigation and first hand accounts
100 Wonders: The Tunguska Event - Atlas Obscura - Video
NASA article on Tunguska
The Tunguska Event at Wikipedia
Nuclear Secrecy - Nukemap
Leonid Kulik
Noctilucent Clouds
Cornell article on Mirror Matter

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