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 ...

For years, scientists have puzzled over how Mars lost the thick atmosphere it once had. That atmosphere was essential for liquid water to exist on the planet’s surface, billions of years ago. Today, ...

Add Yahoo as a preferred source to see more of our stories on Google. The promise of starting life anew on Mars may appear alluring, even feasible, as the climate crisis intensifies and space and ...

On Mars, the thin atmosphere makes the phenomenon far more likely to spark than many researchers once thought. With less gas to damp electric fields, charge can build up to breakdown levels over ...

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 ...

A NASA rover taking rock samples on Mars has uncovered a plentiful mineral that was invisible to orbiters studying the Red Planet from space. Scientists say the discovery of siderite, a type of iron ...