Credit: Wikipedia
Time for another Tunguska meteor theory.
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When a meteor zooms toward Earth at 45,000 mph with the strength 10-15 megatons of TNT—185 times more energy than the Hiroshima atomic bomb—it could possibly take out the entire planet, says Syfy.

If something like that doesn’t scream total annihilation, it’s hard to say what does, except this time it just missed.

Scorched earth and flattened trees were all that was left of the mysterious object after it passed dangerously close to the Tunguska region of Siberia in 1908.

Theories have ranged from a black hole colliding with Earth to a clash of matter and antimatter to an alien spaceship crash-landing. An eyewitness even swore the sky was being ripped in two. But why no crater? No debris?