NASA has released the results of data analysis recently collected by its Mars Rover Curiosity during its ascent of Mount Sharp on Mars. After spending years in areas of Gale Crater that surround the zone where there were still many traces of the ancient presence of water, Curiosity started traveling in a transition zone from a clay-rich region to one full of sulfate salt. The interest in that area is given by the fact that it shows the traces of the great climatic changes that transformed a planet that, when it was young, was similar to the Earth into today’s red planet.