Water is essential to life as we know it. In planetary sciences, it is also considered key to whether life ever existed elsewhere in the Solar System, for example on Mars. One way to approach this question is to investigate martian meteorites that reacted with liquid water when they were still part of the martian crust.
Publication: The scale of a martian hydrothermal system explored using combined neutron and x-ray tomography, J. Martell et al., Science Advances 8 19 (2022). https://doi.org/10.1126/sciadv.abn3044