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: ...

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: ...

Deep in underwater caverns in the Bahamas lie clues to potential life in the far reaches of space. ➡ Subscribe: http://bit.ly/NatGeoSubscribe About One Strange Rock From award-winning filmmaker Darren Aronofsky comes a mind-bending, thrilling journey that explores the fragility and wonder of ...