By combining high-resolution observations of Mars dune ripples and comparing them with sand dunes on Earth, scientists are beginning to understand how surface winds influence the Red Planet.
As if Mars' thin, frigid, dry air wasn't harsh enough, now scientists have found new evidence of acid fog altering the rocks near the Spirit Rover.
Like a woodworm-infested log, new photos from NASA's New Horizons mission of dwarf planet Pluto have revealed a pockmarked terrain that is as puzzling as it is beautiful.
After three Earth years on Mars, the Curiosity rover has found extensive evidence of past liquid water in Gale Crater. Check out some of the highlights.
A babbling river on Mars may have pushed pebbles along for some 30 miles -- according to new analysis of images taken by the Curiosity rover.
How pretty pictures from the Apollo landings helped NASA do real science on the moon.
Once again the world is abuzz about water on Mars -- what's the fuss about this time?
Newly found evidence suggests that two meteors smacked into Earth at the same time, about 458 million years ago.
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