All evidence points to Mars having had a carbon dioxide-rich atmosphere billions of years ago, but insufficient carbonates in Martian soil challenge this theory. Now, a new study using data from ...

Researchers say they have gathered evidence of Mars' atmosphere sputtering for the first time. Understanding how Mars' atmosphere has changed over time will undoubtedly help us discover more about the ...

A European spacecraft has captured the most detailed images yet of Mars’s upper atmosphere, revealing a delicate, layered structure made of dust and ice particles. Described by scientists as ...

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, ...

The fact that the cold, dry Mars of today had flowing rivers and lakes several billion years ago has puzzled scientists for decades. Now, researchers think they have a good explanation for a warmer, ...

Mars’s atmosphere may have once been hundreds of times thicker than it is today, acting as a blanket that protected it from frequent asteroids that ravaged other planets. While the sun and most ...

The European Space Agency's Rosetta mission captured this view of Mars as it flew past on February 24, 2007. - ESA & MPS for OSIRIS Team/MPS/UPD/LAM/IAA/RSSD/INTA/UPM ...

Mars is the fourth planet from the sun and has a distinct rusty red appearance and two unusual moons. The Red Planet is a cold, desert world within our solar system. It has a very thin atmosphere, but ...

Mars may once have hosted sustained rainfall and stable liquid water, according to new findings based on clay minerals ...

Tue, April 22, 2025 at 1:00 PM UTC One of the big remaining conundrums is what exactly happened in Mars’ ancient past that transformed the world from a wet and warm one to the cold, dry orb we see ...