The Universe: Life On Another Planet! "The Next Earth?! (S3, E9) | Full Episode | History

HISTORY

Could we be unique in the universe or is there another planet similar to earth somewhere in the cosmos? See more in Season 3, Episode 9, "Another Earth." #HISTORY #TheUniverse Find out more about the show and watch full episodes on our site: http://www.history.com/shows/ Don't miss a video! Subsc