12/18 Horizon discovers what your cat really gets up to when it leaves the cat flap.
4/18 Following the cosmologists who are attempting to create a map of everything in existence.
7/12 Horizon goes behind the scenes at Nasa to discover how it is preparing a mission to Mars.
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)
The rise of the microprocessor and its effect on industry. (1978)