The Sky At Night

The Hidden Universe (2003x3)

Uitzenddatum: Mrt 02, 2003

We don't know what it is, we can't see it and yet staggeringly it makes up 90% of our Universe. For astrophysicists, dark matter has proved to be an elusive and mysterious substance. In this episode, Patrick Moore talks to Professor Carlos Frenk about the Universe's darkest secret.