2015 मध्ये, _____ वर गोठलेल्या पाण्याच्या भूमिगत हिमनद्यांचा शोध लागला होता.

In 2015, radar studies by NASA's Mars Reconnaissance Orbiter showed huge glaciers of water ice buried under rocky debris at Mars's mid-latitudes, enough to cover the planet in about a metre of ice.