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The Science of Alien Sightings | StarTalk

Neil deGrasse Tyson and SETI Astronomer, Seth Shotsak, talk about alien sightings and how aliens are portrayed in the media. ➡ Subscribe: http://bit.ly/NatGeoSubscribe ➡ Watch all clips of StarTalk here: http://bit.ly/WatchStarTalk ➡ Get More StarTalk: http://bit.ly/NGStartalk About StarTalk: ...

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Reverse Engineering a UFO | National Geographic

Electromagnetic propulsion could send a spacecraft farther and faster into space than any propulsion system known to man. ➡ Subscribe: http://bit.ly/NatGeoSubscribe About National Geographic: National Geographic is the world's premium destination for science, exploration, and adventure. Through ...

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Tout comprendre sur :  le système solaire

Combien y a-t-il de planètes dans le système solaire ? Comment s'est-il formé dans la Voie Lactée ? Apprenez-en plus sur la genèse du système solaire, ainsi que sur ses planètes, ses lunes et ses astéroïdes. Plus d'informations, de photos et de vidéos sur www.nationalgeographic.fr Facebook : ...

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Alien (Full Episode) | One Strange Rock

Life on Earth starts as single-cell bacteria and stays like that for two billion years; then, a miraculous event transforms Earth into a complex interconnected web based on a competition for food. ➡ Subscribe: http://bit.ly/NatGeoSubscribe Get More National Geographic: Official Site: ...

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Flat Earth vs. Round Earth | Explorer

The Ancient Greeks concluded Earth was a sphere, which has been validated by scientists ever since. Despite this, there is a movement growing claiming the Earth is flat. ➡ Subscribe: http://bit.ly/NatGeoSubscribe ➡ Watch all clips of Explorer here: http://bit.ly/WatchExplorer ➡ Get More Explorer: ...

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Legend of Atlantis (Full Episode) | Drain the Oceans

Exciting evidence emerges of civilizations lost for centuries under the waves, from mysterious underwater pyramids off the coast of Japan to the fabled city of Atlantis itself. Using cutting-edge graphics to reveal what's actually lying on the seafloor, and insight from the world's top marine ...

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Bizarre Alien Life Forms | Known Universe: Alien Contact

Life on other planets would adapt to its environment and might be stranger than you could ever imagine. Known Universe: Alien Contact : http://channel.nationalgeographic.com/series/known-universe/4497/Overview ➡ Subscribe: http://bit.ly/NatGeoSubscribe About National Geographic: National ...

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L'augmentation du nombre d'ovnis aux Etats-Unis

Durant la guerre froide, les nombreux survols d'avions de chasse aux États-Unis ont donné lieu à de très nombreux signalements d'Ovnis. Plus d'informations : http://www.nationalgeographic.fr/ Facebook : https://www.facebook.com/NatGeoFrance/ Instagram : ...

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Extraterrestrial Tsunami | National Geographic

Talk about hanging ten: imagine the wave a meteor could create. Say, 100 feet tall. Ready to ride? ➡ 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 ...

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Brazilian Alien Sighting | National Geographic

The gang hears from a witness firsthand. ➡ 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 ...

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