:00:50
[ Man Narrating ]This is the Earth at a time...
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when the dinosaurs roameda lush and fertile planet.
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A piece of rockjust six miles wide...
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changed all that.
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It hit with the forceof 10,000 nuclear weapons.
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A trillion tons of dirt and rockhurtled into the atmosphere,
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creating a suffocatingblanket of dust...
:01:31
the sun was powerlessto penetrate...
:01:33
for a thousand years.
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It happened before.
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It will happen again.
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It's just a question of when.
prev.