New research suggests ancient Mars may have been warm and wet, with rainfall or snowmelt carving its iconic valleys.

"You could pull up Google Earth images of places like Utah, zoom out, and you’d see the similarities to Mars." ...

NASA’s Curiosity rover has uncovered a missing piece in the puzzle of Mars' past atmosphere. Scientists discovered ...

But researchers writing in the journal IMA Fungus say they reckon lichens could survive on Mars today, despite the planet's barren surface. Lichens are a strange "symbiotic" relationship between ...

Despite its current dry and cold state, evidence suggests ancient Mars had significant amounts of liquid water in the form of lakes, rivers, rain, and snow.

WASHINGTON — A mineral called siderite found abundantly in rock drilled by a NASA rover on the surface of Mars is providing ... are features on the Martian landscape that many scientists have ...

Such discoveries suggest water once flowed beneath Mars' surface. On Earth, sulfate minerals can preserve microscopic fossils of microbes. Finding similar structures on Mars could indicate past life.

Plenty of evidence indicates that water once flowed on the surface of Mars and that the planet once had a carbon dioxide-rich atmosphere, and this set of conditions should’ve interacted with ...

Imagine Mars with rain falling from above, rivers flowing fast, and lakes stretching far across its surface. That is the picture drawn by new research, giving fresh insight into the Red Planet’s ...