On April 15, 1912, the Titanic was on its maiden voyage from the U.K. to New York when it struck an iceberg and sank to the bottom of the Atlantic. A detailed map of the wreckage created by combining by 130,000 images captured by unmanned submarines during an expedition in 2010 suggests that while the bow glided nose-first to the bottom of the ocean, the stern picked up speed as it corkscrewed to the bottom of the ocean.
Details on the 2010 expedition findings appear in the April 2012 edition of National Geographic and in a History Channel documentary that will air on April 15.
Sources: National Geographic, AP, BBC, Cincinnati Post
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Audio: How can we better prepare for tornadoes?
An NPR broadcast examines the question of how communities can better prepare for tornadoes like the one that struck Moore, Okla. on Monday. The broadcast features commentary from Michael Fitzgerald, who reported a five-part disaster series for the CNHI News Service.
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National Weather Center personnel Lans Rothfusz and David Andra give viewers an idea of the day-to-day happenings at the Storm Prediction Center in Norman, Okla.
When the earth moves under our feet
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When in a tornado, here's what not to do
Highway overpasses are widely thought to be a last-minute refuge from a tornado, thanks in part to this 1991 video. But, meteorologists say, taking shelter beneath a bridge is probably the last place you want to be when a tornado strikes.
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- Audio: How can we better prepare for tornadoes?