If we find other intelligent life in the universe, what should we expect it to look like?
Carlos Frenk talks to Jim Al-Khalili about dark matter and modelling the cosmos.
Melvyn Bragg examines recently discovered 'dark energy' and its effect on the universe.
Melvyn Bragg and his guests discuss dark matter, the 'missing mass' of the universe.
Sue Nelson joins scientists down a mine on their search for the elusive dark matter.
Ben Miller looks at dark matter, the strange invisible material that fills the universe.
Robin Ince and Brian Cox are joined by Jon Ronson and Seth Shostack from SETI Institute.
Melvyn Bragg and guests discuss our chances of ever discovering life on another planet.
What should scientists do if they come across possible evidence of extraterrestrial life?
Brian Cox and Robin Ince explore how we measure the universe.
Brian Cox and Robin Ince head to Mosi in Manchester and look at the invisible universe.
Author and cosmologist Lawrence Krauss discusses dark energy with Jim Al-Khalili.
Andrew Luck-Baker explores the mystery of patches of bright light over areas on the Moon.
How do we look for alien life, and what are we expecting to find?
Are intelligent aliens out there?
Brian Cox and Robin Ince head to San Francisco to talk aliens and UFOs.
Melvyn Bragg and guests discuss the shape, size and topology of the universe.
Brian Cox and Robin Ince return to discuss the next great mystery for particle physics.