Thirteen years into its mission, NASA's Curiosity rover is still uncovering Martian mysteries — and learning to do more with ...

Every now and then, one of the robots on Mars sends back a picture of an unusual rock it has found on its journeys. After all ...

For years, scientists have puzzled over how Mars lost the thick atmosphere it once had. That atmosphere was essential for liquid water to exist on the planet’s surface, billions of years ago ...

A new look at an ancient volcanic blast on Mars suggests that the Red Planet was much more Earth-like billions of years ago, with abundant surface water and a relatively thick atmosphere ...

It confirms that volcanic CO2 on early Mars did not just escape into space; a significant portion dissolved in water and was then locked away in rocks as siderite. This mechanism provides a tangible ...

Billions of years ago, Mars was warm, wet, and capable of sustaining liquid water on its surface. Scientists have long believed the Red Planet once had a dense atmosphere rich in carbon dioxide ...

If ancient Mars had liquid water, it would have needed a much warmer climate than it has today. Warmer planets usually have thick atmospheres that trap heat. So, perhaps the Martian atmosphere ...

A diagram of the team's proposed carbon cycle on ancient Mars. (Tutolo et al., Sci. Adv., 2025) These results have several implications.

Join planetary scientist Beth Johnson as we explore a groundbreaking discovery from NASA's Curiosity rover on Mars. Scientists have identified siderite—a rare iron carbonate mineral—within ancient ...

Early Mars’ presumably moist, warm climate, however, would have been jeopardized by so much hydrogen sucked out of the thin, carbon dioxide-rich atmosphere, Sauterey said. As temperatures ...