Astronaut Mike Massimino explores the oceans of our solar system and the alien origins of Earth's own seas. This episode is a mashup of "The Planets", S02E15, "Alien Oceans: Search for Life" and "How the Universe Works", S04E07, "The First Oceans".
Cast Appearances
Episode Discussion
Login to leave a comment on this episode.
No comments yet. Be the first!