Space has a trash problem, with defunct satellites, rockets, and smaller broken bits orbiting Earth at high speeds. The amount of space junk is only increasing, raising the risk of collision with ...

One person's trash is another person's treasure, unless, of course, you're talking about space debris, since it's too tough to acquire without a shuttle or a spaceship. That's a shame because space ...

The big picture: In deep-space travel, the race is no longer about who has the biggest rocket – it's about who can build the smartest plasma engine. As the competition to reach Mars intensifies, ...