Magdrive is working on three versions of its space thrusters, and because they run on solid metal, they might one day even be powered by space junk collected directly in orbit, turning it from threat ...

On December 30, a mysterious 1,100-pound object in the shape of a massive, 8-f00t metal ring was discovered in a remote Kenyan village, prompting widespread speculation it had fallen from space.

Space is getting crowded — humans have now placed over 20,000 satellites into orbit since the start of the space age, and there are plans to launch thousands more over the next few years.