July 25, 2018 / Modified jul 25, 2018 10:39 a.m.

Scientists Discover Liquid Lake Under Mars Ice

Arizona researcher suggests it's the strongest evidence of liquid water so far.

Mars detail Mosaic of the Valles Marineris hemisphere of Mars, by the Viking Orbiter. The Valles Marineris canyon system is visible. (PHOTO: NASA, JPL-Caltech)

LISTEN

Scientists have long known that Mars has water in the form of ice and certain minerals. New data might settle the 30-year debate over whether the red planet holds liquid water, too.

Radar data by the European Space Agency’s Mars Express spacecraft has revealed a 12-mile-wide lake of liquid water one mile below Mars’s south polar ice. Such radar reflects brightly where ice and water meet, a fact scientists have used to detect subglacial lakes on Earth.

Here and on Mars, such lakes might stay liquid because dissolved salts, and pressure from above, lower water’s freezing point. Arizona State University’s Jim Bell, who works on NASA’s Mars missions, says it’s the strongest evidence for liquid water so far.

“It’s a really provocative result, if true, and so I think it really begs for additional data,” Bell said.

The findings appear in the journal Science.

Arizona Science Desk
This story is from the Arizona Science Desk, a collaborative of the state's public radio stations, including NPR 89.1. Read more from the Arizona Science Desk.
By posting comments, you agree to our
AZPM encourages comments, but comments that contain profanity, unrelated information, threats, libel, defamatory statements, obscenities, pornography or that violate the law are not allowed. Comments that promote commercial products or services are not allowed. Comments in violation of this policy will be removed. Continued posting of comments that violate this policy will result in the commenter being banned from the site.

By submitting your comments, you hereby give AZPM the right to post your comments and potentially use them in any other form of media operated by this institution.
Arizona Public Media broadcast stations are licensed to the Arizona Board of Regents. Arizona Public Media and AZPM are registered trademarks of the Arizona Board of Regents.
The University of Arizona