Poster of Cast and Crew in Horizon - Season 43 - Episode 5 - Most of Our Universe Is Missing

Horizon - Season 43 - Most of Our Universe Is Missing (Episode 5)

Plot: Only 4% of our universe is made from stuff we understand. Horizon explores the 96% that is made up of the elusive substance 'Dark Matter'
Episode Aired On:
Thursday, February 9 2006
18 years ago