Season 8, Episode 20 The Asteroid and Dinosaur
First Aired: March 10, 1981
Geologist Luis Alvarez proposes a theory that an asteroid's fall caused the extinction of dinosaurs 65 million years ago. Another theory postulates that the same cataclysm triggered the volcanic birth of Iceland. Bill Mason is the narrator.
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- Premiered: March 3, 1974
- Rating: None
- Premise: PBS's premier science-documentary series, which has won six Peabody Awards and more than 20 Emmys (four in 2002 alone) since its 1974 debut. `Nova' clearly, and often engagingly, `demystifies' a vast range of science, technology and history topics---past a… (more)