Earth is the only planet known to maintain life. Find out the origins of our home planet and some of the key ingredients that help make this blue speck in space a unique global ecosystem. ➡ Subscribe: http://bit.ly/NatGeoSubscribe #NationalGeographic #Earth #EarthDay 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: http://bit.ly/NatGeoOfficialSite Facebook: http://bit.ly/FBNatGeo Twitter: http://bit.ly/NatGeoTwitter Instagram: http://bit.ly/NatGeoInsta Read more in "Planet Earth, explained" https://on.natgeo.com/2WAe19n Earth 101 | National Geographic https://www.youtube.com/watch?v=HCDVN7DCzYE National Geographic null