NASA’s Curiosity rover has spent six months exploring the site to investigate if they are a clue to the presence of water.

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

The web-like features are believed to be sculpted by ancient groundwater, offering new clues about the Red Planet's watery ...

Samples taken from an ancient Mars rock may indicate that ancient life once existed on the Red Planet, according to a study ...

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

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 ...

NASA’s Curiosity rover has assembled a string of chemical evidence from ancient Martian rocks that, taken together, builds the strongest circumstantial case yet for conditions that could have ...

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

A new study of carbon-based molecules in a Martian rock offers new hints about the possibility that the red planet once ...