Aired
March 10, 1981
For 150 million years, non-avian dinosaurs dominated the Earth. Then, 65 million years ago, they suddenly vanished, along with a great deal of the planet's animal and plant life. NOVA examines a remarkable theory about the cause of the catastrophe—in which the first clue to the solution was a piece of clay.
Episode 8 of Season 8 from NOVA — available to stream in HD on any device.
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