10/13 A look at dark matter ahead of the LHC being switched on, having been upgraded.
5/15 Featuring scientists studying psychopathic killers and searching for the moral molecule.
9/13 A look at the evidence of gravitational waves discovered at the South Pole in March 2014.
8/13 A look at new planets being discovered and what this means for our solar system.
The story of the men who orbited Earth on board the ill-fated Mir space station. (1998)
Examining the US fear that the Russians are ahead of them in the space race. (1981)
The discovery by physicists of a unique particle. (1964)
Horizon follows an expedition to the Andes in search of a missing plane. (2000)
Horizon investigates the growing tendency to induce childbirth. (1975)
Programme about deafness in Britain today. (1973)