Mars’ water mystery may have a simple ice answer

Scientists have found that ancient Martian lakes could have survived for decades despite freezing air temperatures. Using a newly adapted climate model, researchers showed that thin, seasonal ice could trap heat and protect liquid water beneath. These lakes may have gently melted and refrozen each year without ever freezing solid. The idea helps solve a long-standing mystery about how Mars shows so much evidence of water without signs of a warm climate.