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Season Finale

How the Universe Works: Season 5

5x09 Strangest Alien Worlds
TV-PG

  • 2017-02-08T02:00:00Z on Science
  • 42m
  • United States
  • English
  • Documentary
Discoveries of new planets have revealed countless worlds much stranger than Earth. Some of these worlds don't have stars, others are made out of diamonds. Will we ever find a planet like Earth, or are these distant worlds stranger than fiction?
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