A strange, gleaming rock on Mars has jolted planetary scientists out of their routines, not because it is large or dangerous, but because it appears to be wildly out of place. The object, sitting ...

Curiosity has been exploring the surface of Mars since 2011, but what it found inside a rock last year has changed our ...

Maven, an acronym for Mars Atmosphere and Volatile Evolution, abruptly stopped communicating with ground stations on Dec. 6.