Unlock the mysteries of the sunken city Atlantis. Watch the series premiere of "Secrets of the Lost" NOW on Science Channel and on SCigo. | Science Channel

Where did the Earth’s oceans come from? For years, scientists suspected that they came from molecules delivered to Earth from distant stars by comets and asteroids, but an exciting discovery suggests that their true origins could be more exotic than anyone had ever imagined. #ScienceChannel #HowTheUniverseWorks | Science Channel