Going Up? Waiting for the Space Elevator

A space-elevator experiment is now at the International Space Station. The technology it's testing, if implemented on a large scale, could revolutionize spaceflight, advocates say.

Deep-Space Radiation Could Damage Astronauts' Guts

Deep-space missions, to Mars and beyond, could spell trouble for astronauts, according to new research showing that cosmic radiation can damage the digestive tract, stomach and colon.