Geological chemistry

This view of Belva Crater was created using data collected by the Mars Perseverance rover on April 22, 2023. Credit: NASA/JPL-Caltech/ASU/MSSS

The lost atmosphere of Mars has been discovered hidden in its clay

Mars was not always the cold, desolate desert we see today. There is more and more evidence that water once flowed across the surface of the Red Planet, necessitating the existence of a thick atmosphere, but suddenly