NASA Confirms Water Ice Deposits Found Beneath Mars South Pole Are Larger Than Expected

Scientists at NASA confirmed on Thursday that water ice deposits buried beneath the Martian south pole are substantially larger than previous estimates, a finding that significantly strengthens the case for a future human presence on the red planet.

Using radar data from the Mars Reconnaissance Orbiter, researchers measured the subsurface deposits at approximately 2.8 million cubic kilometers — enough, if melted, to cover the entire Martian surface in a shallow ocean roughly 1.5 meters deep.

“This changes our calculus for long-duration missions,” said the mission’s principal investigator. “Water is everything. It’s drinking water, it’s rocket propellant, it’s radiation shielding.”

The discovery also reopens scientific debate about whether Mars once harbored conditions suitable for microbial life. Liquid water, widely considered a prerequisite for biology as we understand it, would have been abundant during the planet’s ancient past.

NASA’s Artemis program timeline does not yet include Mars landings, but agency officials noted the findings would inform planning for missions targeted for the late 2030s.