The surface of Mars is extremely cold, irradiated, and desiccated. But at one time, the planet was much warmer and wetter, ...

Mars, today a cold, irradiated, and dry world, once had a much warmer and wetter environment. The planet was covered by lakes ...

Though most of the region surrounding the rock is light-colored and dusty, Skull Hill is dark, angular, and covered in tiny ...

For the past four years, NASA 's Perseverance rover has rambled over a region of Mars where scientists say a strong river ...

Mars may once have had a relatively warm and wet climate conducive to flowing water, rain and snow, producing a terrain much ...

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

Mars Express captures images of Acheron Fossae, revealing the Red Planet’s split terrain—ancient cratered highlands and ...

Visit ancient Mars -- a surprisingly temperate planet ... was only about 75% as bright as it is today. Sprawling ice caps may have covered the highlands around the Martian equator, occasionally ...

The world's most famous telescope is celebrating in style with new views of Mars, nebulas and a galaxy that reminds us of ...

K2-18b, an exoplanet 120 light-years away, may be the best hope to confirm that life exists beyond Earth. Here's what to know ...

K2-18b, an exoplanet 120 light-years away, may be the best hope to confirm that life exists beyond Earth. Here's what to know ...