Watch a prototype of NASA's Volatiles Investigating Polar Exploration Rover, (VIPER) roll down a ramp to simulate its ...

Scientists are working to understand the curious phenomena of red sprites, green ghosts and blue jets high above ...

After nearly 20 years of operations, NASA's Mars Reconnaissance Orbiter (MRO) is on a roll, performing a new maneuver to squeeze even more science out of the busy spacecraft as it circles the Red ...