Incredibly, it worked: he might have been overheating, upside down, and suffering from the first pangs of the bends, but Leonov made it back inside his craft. It was time to go back home.

It’s the stuff of nightmares: stuck in outer space, alone, with no way to get to safety except by exposing yourself directly to the cold, deadly vacuum around you. But that was the reality for Alexei ...

Two NASA astronauts aboard the International Space Station (ISS) are about to climb into their spacesuits and enter the vacuum of space, and you can watch the event live. The first NASA spacewalk in ...