The discovery of a world which may have habitats capable of supporting life.
15/18 How it was hoped we would be able to observe a feeding supermassive black hole in action.
9/15 How a predicted spate of impending solar storms may affect our technological civilisation.
Looking at how asteroids are responsible for both life and death on our planet.
2/18 Behind the scenes at Nasa, as they prepare to the land the Mars rover on the planet.
Why hasn't science worked out how to predict when and where the next quake will happen?
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)