
The Precipice
What You Will Learn
00:00
Asteroid Tracking
One day, this big hunk of rock floating around in space, slammed into earth's surface just off the coast of mexico. It made lision at about 60 thousand kilometers per hour. A drillion tons of rock was moving so fast that it released the equivalent of ten billion hiroshima bombs. This is a catastrophe that caused mass extinction. Three quarters of all species on earth were completely annihilated.
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