A mineral called siderite found abundantly in rock drilled by a NASA rover on the surface of Mars is providing fresh evidence of the planet's warmer and wetter ancient past when it boasted substantial ...

Learn more about the Curiosity's carbonate discovery on Mars, and what it tells of about Mars' past and Earth's future.

The lead author of a new study pointing to more proof of water on Mars says it brings scientists a step closer to determining ...

A new study led by a University of Calgary scientist has found evidence that suggests Mars once had a carbon cycle, giving ...

In those drill sites, Curiosity detected deposits containing an iron carbonate material called siderite. According to Ben ...

The siderite identified in Curiosity data helps confirm and refine models of Mars's early warm period, more than 3.5 billion ...

A treasure trove of clues from Curiosity reveals that ancient Mars once trapped massive amounts of CO2 in its crust, thanks ...

Perseverance explores Jezero Crater’s rim, uncovering diverse rocks that reveal Mars’ ancient geology and possible signs of ...

A scientific analysis of samples collected on the surface of Mars shows the red planet has evolved its own version of a ...

To study Mars’s chemical and mineral makeup, the Curiosity rover drills one to 1.5 inches down into the subsurface, then ...

Bold claims of ‘biosignature’ molecules trigger an outpouring of scepticism.