Due to extreme temperatures and the dryness of Mars, it's thought to be impossible for liquid water to form on the planet's surface, a critical precondition for habitability. The only hope of finding ...

"Our work is a new piece of evidence that suggests that Mars was once a much more complex and active planet than it is now." ...

Frost-covered regions present the best candidates for the future habitability of Mars and further astrobiological exploration, research into brines shows.