"Massive Water Reservoir Discovered in Mars' Medusae Fossae Formation"

Mars Express has discovered evidence of a massive water ice deposit up to 3.7 km thick in the Medusae Fossae Formation (MFF) on Mars, challenging previous assumptions about the composition of this region. The findings suggest that the MFF contains alternating layers of dust and ice, with the ice deposits potentially holding enough water to cover the entire planet in a layer 1.5 to 2.7 meters deep. This discovery raises questions about Mars's climate history and presents potential opportunities for future human or robotic exploration.