Go behind the scenes at a factory that makes top-of-the-line artificial legs that contain hydraulics, brakes, microchips, and miniature motors. ➡ Subscribe: http://bit.ly/NatGeoSubscribe About I Didn’t Know That: Two industrial scientists, Richard Ambrose and Jonny Phillips, explain the science behind everyday life… from microwave ovens to beating a lie detector. …

“There was an abundance of hate speech on Twitter after Obama’s reelection, with people hurling violent and racial epithets. Many of those tweeters were teenagers whose public Twitter accounts feature their real names and advertise their participation in the sports programs at their respective high schools. Calls were placed to …

“Paula Broadwell, whose reported relationship with former CIA director David Petraeus hastened the end of his career last week, has come under scrutiny for the unusual level of access she appears to have had in the process of writing a biography of the general. In a speech this summer at …

“Former Gen. David Petraeus’ affair was uncovered by email tracing that directed investigators to an email account that linked the then-CIA chief to Paula Broadwell, according to the Wall Street Journal. After Jill Kelley, a volunteer organizer of social events at MacDill Air Force Base in Tampa, Fla., alerted the …

“Firebrand Republican Rep. Allen West was defeated by Democratic challenger Patrick Murphy, according to the state’s vote count Saturday, but the incumbent won’t concede. The state issued complete but unofficial results showing Murphy with a lead of 2,442 votes, or 50.4 percent. That’s beyond the half-percent margin needed to trigger …

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http://channel.nationalgeographic.com/channel/doomsday-preppers/ ➡ Subscribe: http://bit.ly/NatGeoSubscribe About National Geographic: National Geographic is the world’s premium destination for science, exploration, and adventure. Through their world-class scientists, photographers, journalists, and filmmakers, Nat Geo gets you closer to the stories that matter and past the edge of what’s possible. Get More National Geographic: Official Site: …