Data from the Rosetta mission, the Mars rover and the Herschel space observatory point to water's extraterrestrial origins.
*Beware of alarmist headlines. The odds are slim when it comes to giant Earth-bound asteroids.
Bacterial spores, lichens and plant seeds were exposed to outer space conditions for 18 months, and lived to tell about it!
Scientists have a new estimate for the geological age of one of Mercury's oldest regions.
NASA's Curiosity rover has found evidence for life-supporting conditions on ancient Mars.
The Kepler space telescope has shown us that we live in a galaxy full of Earth-sized planets.
For billions of years, the Earth's only natural satellite has been bombarded with asteroids. Surely, it's been the target of space rocks in the past.
After solving the problem of dining in space, astronauts need to think about the next natural step!
Would food fly off a plate in space? Would astronauts have digestive problems? Learn the science behind space food!