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: bit.ly/NatGeoSubscribe ➡ Watch all clips of Explorer here: bit.ly/WatchExplorer ➡ Get More Explorer: bit.ly/MoreExplorer #NationalGeographic #FlatEarth #Explorer About Explorer: Explorer, the longest-running documentary series in cable television history, honored with nearly 60 Emmys and hundreds of other awards, continues as a series of major specials on the National Geographic Channel. In the course of more than two thousand films, Explorer has taken viewers to more than 120 countries, opening a window on hidden parts of the world, unlocking mysteries both ancient and modern, and investigating stories of science, nature, and culture. Get More National Geographic: Official Site: bit.ly/NatGeoOfficialSite Facebook: bit.ly/FBNatGeo Twitter: bit.ly/NatGeoTwitter Instagram: bit.ly/NatGeoInsta 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. Flat Earth vs. Round Earth | Explorer youtu.be/06bvdFK3vVU National Geographic www.youtube.com/natgeo