Horizon: How Big is the Universe?

BBC FOUR

Tuesday 21 March 2017  20:00 - 21:00 (60 mins)
4/18. Series exploring scientific issues. This episode follows the cosmologists who are creating the most ambitious map in history - a map of everything in existence. Also in HD. [S]

Horizon: How Big is the Universe? may be available on playback
Horizon: How Big is the Universe? (BBC FOUR) Tuesday 21 March 2017 20:00 - 21:00