00:00What if a space rock exploded above your city with the force of 1,000 Hiroshima bombs?
00:06On June 30th, 1908, the sky above remote Siberia suddenly erupted into a blinding fireball.
00:14Seconds later, a massive air blast flattened nearly 80 million trees across more than 2,000
00:20square kilometers. But when scientists finally reached the site years later,
00:24they found something impossible. No impact crater. The answer? A 50 to 80 meter asteroid never hit
00:32the ground. It exploded 5 to 10 kilometers above Earth, releasing energy equal to 3 to 15 megatons
00:39of TNT. The explosion was so powerful that night skies glowed across Europe for days,
00:46and instruments detected the shockwave thousands of kilometers away. If Tenguska had exploded over
00:52a modern city instead of empty Siberia, millions of lives could have changed in a single morning.
00:57The real question is, when will the next one arrive?
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