A new study reconsiders the controversial findings of NASA's Viking Mars lander in 1976, which some argue may have shown signs of past life on the Red Planet.

Engineers have had to come up with some interesting ways to generate oxygen for astronauts in the vacuum of space.

The ship was reportedly carrying a 1,000-ton shipment of sodium perchlorate, a precursor chemical for rocket fuel, European intelligence sources told CNN. Intelligence sources also told CNN that ...