Why it matters: While not evidence of life, these discoveries show that ancient Mars had complex organic chemistry, ...

A potential new mineral on Mars forms when iron sulfates are heated above 100°C. Data from Valles Marineris regions suggest ...

NASA's Curiosity rover just found bizarre nodules on giant Martian "spiderwebs." Scientists are puzzled.

NASA finds carbon molecules in ancient Martian lake, and scientists admit it is difficult to explain them without life.

Ancient Mars is starting to look less like a scattered patchwork of dried-up valleys and more like a planet once ruled by continent-scale rivers. For the first time, scientists have traced giant ...

Craters, craters, and yet more craters: this snapshot from ESA's Mars Express is packed full of them, each as fascinating as ...

Long before Mars turned into the frozen desert you see today, water shaped its surface in dramatic ways. Rivers cut through highlands, lakes pooled inside craters, and floods tore open canyon walls.

Learn about geologic formation on Mars that resemble spiderwebs, serving as records of ancient groundwater flow on the planet.

Add Yahoo as a preferred source to see more of our stories on Google. When you buy through links on our articles, Future and its syndication partners may earn a commission. A simulated view of a lake ...

A 6.5-foot Mars sand ridge called Hazyview reveals how strong, steady winds once shaped the planet’s surface and soil ...

For more than a century, astronomers debated the possibility of martian canali (channels) which Italian astronomer Giovanni Schiaparelli claimed to see on the Red Planet in 1877. Mistranslated into ...