NASA's Perseverance rover discovered rocks on Mars, providing new evidence the red planet was once a wet, habitable world ...

Mars, once a much wetter and more dynamic planet, is now a dry and inhospitable desert. The mystery of how the red planet ...

Mars is a cold, dry, desert-like planet. But billions of years ago, scientific evidence suggests that it had a thick atmosphere, which kept it warm enough to support flowing water on its surface. So, ...

Since humans first started observing Mars, the existence of nocturnal ice clouds on the Red Planet has been known, primarily through daytime observations and sophisticated climate models. Twilight ...

Mars may have been a "blue planet" with an ocean the size of today's Arctic Ocean, a new study suggests.

The current image of Mars as an arid and hostile desert contrasts sharply with the history revealed by its surface. Channels, ...

Three years ago, Martian dust shrouded the solar panels on NASA’s InSight lander, preventing further operations and leading to its retirement. But the mission’s data continues to reveal information ...

Advances in technology have reopened the debate over terraforming Mars, shifting it from an impossible dream to a long-term scientific and ethical question.

Bright white rocks found by NASA’s Perseverance rover hint at ancient Martian rain lasting millions of years, raising new questions about how wet Mars once was and what those conditions might mean.