Sept. 21, 2006 -- -- In the Cydonia region of Mars' northern hemisphere is a massif, a large outcropping of rock that protrudes upward from the surrounding plain. Or maybe it's a face. That's the ...

In 1976, NASA’s Viking 1 Orbitersent back a series of images from Mars that would spark one of the most enduring mysteries in space exploration: the Face on Mars. Captured in the Cydonia region, this ...

Billions of years ago, the face of Mars was likely very different from its current appearance. A recent study examined clay minerals and detected traces of mild and wet periods that persisted over ...