Have you ever seen what the surface of Mars looks like as photographed by a spacecraft? The Martian surface is like a desert environment, covered with grains of sand called “regolith”. Mars regolith is a porous material with many voids, and it is known to adsorb water vapor on its surface and store ice in its pores. NASA/JPL-Caltech/ASU/MSSS Recent studies have revealed that water in the regolith is released into the atmosphere during the day and stored underground at night. However, the extent to which this phenomenon affects the Martian water cycle is not yet well understood. It is also...
