Astronomers detected a strange square structure on Mars in 2001. After two decades of study as to what it may be, NASA has ...

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 ...

The sudden silence of a veteran Mars spacecraft has turned a routine comet flyby into one of the most intriguing space mysteries of the year. After tracking a rare interstellar object near the Red ...

A Harvard astrophysicist and NASA are locked in a public disagreement over a small, shiny object photographed on the Martian surface. The dispute hinges on whether the object is human-made debris or ...

A small, cone-shaped object photographed on the surface of Mars has ignited a public dispute between a prominent Harvard University scientist and NASA over what it actually is—and whether the space ...