Young Mars featured a dense atmosphere and water resources
Yet, over the past billions of years, the Red Planet has lost much of both its gas envelope and its hydrosphere.
Nevertheless, Mars has still managed to retain some water in the form of subsurface ice deposits. Data collected by spacecraft suggest that they are much more widespread than previously thought.
According to some estimates, up to one-third of the planet contains hidden deposits of water ice
#Mars
@AstroMechanics
