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 | Asteroid (Oct. 2006)
Will a doomsday rock the size of the Rose Bowl hit Earth in 2036? Watch now (12 mins.) | |
 | Hurricane Katrina (Oct. 2005)
Scientists' warnings proved sadly prescient about New Orleans' risk from hurricanes. Watch now (4 mins.) | |
 | Hurricanes (Jan. 2005)
Predicting a hurricane's intensity is notoriously difficult, but new tools may make it easier. Watch now (12 mins.) | |
 | Mass Extinction (Nov. 2006)
What caused the mother of all extinctions 250 million years ago? Watch now (13 mins.) | |
 | Mt. St. Helens: Back From the Dead (May. 2010)
Thirty years after the massive eruption, could it happen again? Watch now (50 mins.) | |
 | The Spy Factory (Feb. 2009)
Examine the high-tech eavesdropping carried out by the National Security Agency and the pitfalls of surveillance in an age of terrorism. Watch now (50 mins.) | |
 | Storm That Drowned a City (Nov. 2005)
Experts and eyewitnesses reconstruct the devastating floods that Hurricane Katrina unleashed on New Orleans. Watch now (49 mins.) | |
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Created July 2008
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