Curiosity rover images show iridescent clouds on Mars, helping scientists explore atmospheric and climate dynamics.

There seems to be too much of a radioactive element in rocks deep in the Pacific Ocean – how did it get there 10 million ...

Russia's state-owned Rosatom announced a prototype plasma engine which could speed up travel to other planets.

An annual safety report to NASA has both praise and also underscores a number of cautionary woes, including the space ...