For years, nuclear propulsion sat in the same category as so many ambitious space ideas, impressive on paper, always a few ...

NASA’s Perseverance rover may have stumbled on a visitor from outer space – a strange, shiny rock on Mars that scientists think could be a meteorite forged in the heart of an ancient asteroid.

NASA has lost contact with one of its three spacecraft orbiting Mars, the agency announced Tuesday. Meanwhile, a second Mars orbiter is perilously close to running out of fuel, and the third mission ...

NASA has successfully pushed the rotor blades of itsnext-generation Mars helicopters past the speed of sound, marking a major advancement in the agency’s exploration of the Red Planet. These rotor ...