Complete video at: fora.tv Celebrity astrophysicist Neil degrasse Tyson describes one possible solution for altering the trajectory of an earthbound asteroid. ----- Neil degrasse Tyson discusses "Death by Black Hole: And Other Cosmic Quandries." Whether discussing the universe's origins as host of nova's "sciencenow" or asserting that Pluto is a not a planet on "The Colbert Report," astrophysicist Neil degrasse Tyson translates the universe's complexities for a broad audience. Known as the great explainer of all things cosmic, Tyson first became known in the astronomy community by lecturing on the subject at the age of fifteen. He is currently the director of New York's Hayden Planetarium at the American Museum of Natural History, where he also teaches. Tyson has written seven popular books including the bestselling Death by Black Hole and the memoir The Sky Is Not The Limit. His professional research explores star formation, dwarf galaxies, exploding stars, and the structure of the Milky Way, topics which he writes about in his long running "Universe" column in Natural History magazine. Tyson's varied honors include the NASA Distinguished Public Service Medal and People Magazine's 2000 "Sexiest Astrophysicist Alive" - City Arts & Lectures Ryan Wyatt is a science visualizer for the American Museum of Natural History in New York City. A longtime planetarian, he is actively involved in promoting fulldome video technology within the planetarium community. He manages the ...

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This video shows the Monarch Gyroplane with the new landing gear installed and being tested. At the conclusion of this video I have 3 hrs of testing and practice on this amazing Landing Gear. The G Force All Terrain Landing Gear is quite remarkable. I have been flying a gyro now for over 5 years and this is simply the most fun I've had with multiple touch and goes. The G Force definitely opens up the flight envelope for me. The fun factor is through the roof! Safety is enhanced......G Force All Terrain Landing Gear......Awesome.

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CDF Helicopter Landing @ Discovery Bay Boat harbor AGC field trip

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Questions are asked about the amount of energy needed to pulverize concrete. Witnesses discuss their experiences. DVD available at: www.911eyewitness.com

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It's a bird! No, a plane! No... what is that? It's the lawn mower that got away... And then flew into the blue.

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9/11 as seen in clips and stills and with respect and musical accompaniment, This short film was originally made for the 1st anniversary of the tragedy, with The Twin Towers of Light ...above New York City, New York. USA

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www.visamotion.com

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2 Cell lipo's are 7.4 volt. lipos will be ruined if they go below 3 volts per cell, thus the importance in this test. It may not mean much to you that the lipo is 1 volt less than a nimh or Nicad, but this test is important because to protect the lipos, the manufacturers usually set the motor cut-off voltage at 3 volts, so the battery wont go bad. So in this case, the radio shuts off the motor at 6 volts. But even though I have a volt less than the nimh and a lot more mahs, I cannot use all the extra mahs because it gets cut off early due to the lower voltage. Also, this video was requested and should answer this question I keep getting. That is, will the Hobbyzone Firebird Phantom fly on a lipo, since it is a volt less at 7.4 vs 8.4 in the nimh? (It's not recommended to even try a 3C 11.1v) or the motor speed controller will burn up. So these results are from Jeff and I doing a fly-off. You have to decide if it is worth it to get a Lipo, considering cost, time of charge (nimh can be charged faster) and weight and the radio's safety cut-off for Lipos. A Lighter battery also means you will have to add clay weight to the nose for it to be properly balanced or you will be flying nose high like I was. And since it will cut off earlier, your really gaining no big advantage. Thanks for watching and happy flying. Dave

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www.youtube.com This is the original version and has been remade into an updated version which you can find on my channel.

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Przez siedem dni Les Stroud dryfuje na rozpadającej się tratwie po wodach u wybrzeży Belize. Musi nie tylko pokonać głód i pragnienie, ale także stawić czoła upałom.

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