Two robots on opposite sides of Mars have each turned a slow, patient circle and photographed everything around them, producing a matched pair of 360-degree panoramas separated by 2,345 miles of ...

Valles Marineris is an enormous rift valley system on Mars that scientists want to scour for traces of liquid water, which may exist in sheltered niches and serve as an habitat for possible life. But ...

While NASA imagery has shown evidence of ancient rivers and lakes on Mars that transitioned to dry dunes, uncertainty remains over the timing of the environmental changes that may have contributed to ...