Scientists have found strong evidence of liquid water just 5 to 8 kilometers beneath Mars’ surface—much closer than ...

The finding could explain the long-running mystery of why the surfaces of the lunar near and far sides are so different.

By listening to the echoes of ‘Marsquakes’ boffins uncovered signs of water 3.4 to 5 miles below the red planet's surface as ...

A reappraisal of decades-old data suggests that strange circular formations on Venus could be volcanic “rings of fire” ...

A team of planetary scientists has developed a promising new way to peer beneath the dusty surface of Mars and other ...

Mountains rise, volcanoes spew, and Earth itself quakes as the crust constantly remakes itself in the ceaseless cycle of ...