How the Universe Works Season 5 Episode 2
Mystery of Planet 9
Scientists have discovered a mysterious ninth planet on the very edge of our solar system. Ten times the size of Earth, this strange world could have moons with extraterrestrial life.
5 - 9Strangest Alien WorldsFeb. 07, 2017- 5 - 8The Dark Matter EnigmaJan. 31, 2017
- 5 - 7Life and Death on the Red PlanetJan. 24, 2017
- 5 - 6The Universe's DeadliestJan. 17, 2017
- 5 - 5Stars That KillJan. 10, 2017
- 5 - 4Secret History of PlutoJan. 03, 2017
- 5 - 3Black Holes: The Secret OriginDec. 06, 2016
- 5 - 2Mystery of Planet 9Nov. 29, 2016
- 5 - 1Most Amazing DiscoveriesNov. 22, 2016
