The tests also revealed that the ditches only develop on dunes with very fine, evenly sized sand grains. Coarser or more ...

Blocks of carbon dioxide ice appear to carve mysterious gullies on Mars as they melt down dune slopes and blast away sand.

Buried underground near the surface, frozen regions of Mars could have tiny hidden channels full of liquid water, which could be a habitable environment for microscopic organisms ...

On windswept dunes inside Martian craters, such as Matara and Russell, the Red Planet wears a curious pattern that has long ...

For years, scientists have been looking for signs of liquid water just beneath the surface of Mars. The problem, though, is that the observations from various orbiting probes have been maddeningly ...

Mars, once thought too cold and dry for liquid water, may briefly host salty brines twice a day during certain seasons. These fleeting bursts wouldn’t be enough to sustain humans, but they could have ...

New research using NASA’s Perseverance rover has uncovered strong evidence that Mars’ Jezero Crater experienced multiple episodes of fluid activity — each with conditions that could have supported ...

NASA’s report of potential signs of ancient life on Mars has reignited a long-running scientific debate about how common life ...

Our friends at the UA Lunar and Planetary Lab’s HiRISE camera are in the headlines today: “I’m going to hear from my colleagues: ‘So, you’ve discovered water on Mars for the thousandth time?’ ” says ...

Discovered: What a never-before-seen type of rock tells us about water on Mars; forecasting the flu based on weather; atoms get colder than absolute zero; you'll change more than you think. The new, ...