Mars, now a dusty world of rusted rock and thin air, once carried enough water to transform its face into something far more ...

Led by the University of Bern, the study involved investing Valles Marineris, the largest canyon system on Mars.

Rocks that stood out as light-colored dots on the reddish-orange surface of Mars now are the latest evidence that areas of the small planet may have once supported wet oases with humid climates and ...