NASA announced today that Mars, which scientists once thought of as a dry, dusty planet, is home to liquid water. That makes Mars an even better candidate for supporting alien—or, one day, human—life.

Mars once looked far more like Earth, with a thicker atmosphere and liquid water pooling on its surface, yet today it is a frozen desert where even a thin wisp of air struggles to hold on. NASA’s ...

Searching for water on Mars often feels like chasing a flicker of hope in a cold and quiet world. You read about dried riverbeds, ancient lakes, and canyons carved by water that vanished long ago. So ...

Mars changed from a blue world with water to a red desert because its atmosphere escaped into space over billions of years.

It’s official. NASA scientists have found evidence of present-day liquid water on Mars. But before you start thinking about a second home there, know this: that water isn’t drinkable. It’s chockfull ...

Ancient Mars boasted abundant water, but the cold and dry conditions of today make liquid water on the Red Planet seem far less probable. However, the Mars Advanced Radar for Subsurface and Ionosphere ...

Photographs taken from NASA's Reconnaissance Orbiter reveal that there is liquid water, even today, on the surface of the Red Planet. That's according to a paper published today in the journal Nature ...

MRO used a special maneuver that rolls the spacecraft over 120 degrees. This enhances the power of SHARAD, which is MRO’s ...

MAVEN (short for "Mars Atmosphere and Volatile Evolution") has been silent since Dec. 4, despite repeated efforts to hail the spacecraft, NASA announced in an update on Monday (Dec. 15). And a ...

A new study uses sharper radar to challenge a suspected Martian south-pole lake, offering a dry, reality-checked explanation.