Horizon goes behind the scenes at NASA as they countdown to the landing of a 2.5 billion-dollar rover on the surface of Mars. In six days time, the nuclear-powered vehicle - the size of a car - will be winched down onto the surface of the Red Planet from a rocket-powered crane. That's if things go according to plan: Mars has become known as the Bermuda Triangle of space because...
Mats Steen, a Norwegian gamer, died of a degenerative muscular disease at the age of 25. His parents mourned what they thought had been a lonely and isolated life, when they started receiving messages from online friends around the world.