Groundbreaking study finds Mars may once have had rain and snow - Research provides new insights into evolution of Red Planet ...

Visit ancient Mars—a surprisingly temperate planet where snow or rain falls from the sky, and rivers rush down valleys to ...

and the planet cooled. Except for the scraps frozen into the polar caps, its water was lost to space or stored away as subsurface ice. And this all happened billions of years ago. The early Mars ...

NASA's Perseverance rover has rambled over a region of Mars where scientists say a strong river once emptied into a crater, ...

The left-hand panel shows the surface topography of Mars’s south pole, with the outline of the south polar cap in black ... inferred subglacial water. The ice in the region is around 1500 ...

Stretching for hundreds of miles along the planet’s equator is the ... match what we’d expect from layered ice, similar to Mars’ known polar ice caps.” Ice, not dust: Modeling reveals ...

A new analysis by UC Boulder geologists suggests the ancient Mars landscape was formed by falling precipitation, including ...

Radar scans reveal up to 2.2 miles of subsurface ice beneath Mars’s Medusae Fossae, per Geophysical Research Letters. The formation was long thought to be loose ash or dust—but its low density ...