Season 36, Episode 5 Megabeasts' Sudden Death
First Aired: April 1, 2009
An investigation of a possible comet strike in the Great Lakes region some 12,900 years ago, which could explain the extinction of such mega-creatures as the saber-toothed cat and woolly mammoth in North America. Included: the discovery of nanodiamonds created from the heat and impact of extraterrestrial objects; remarks from climate scientist Paul Mayewski, geologists James Kennett and Allen West, archaeologist Vance Haynes and physicist Mark Boslough.
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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)