New Signs of Recent Glaciers, Volcanoes and Flowing Water on Mars

New images of Mars reveal that flowing water, large glaciers and active volcanoes have scoured the planet in recent geologic times. Scientists say Mars has been geologically active in the past few million years — an eyeblink in the planet’s 4.5-billion-year history. Three studies appearing in the March 17 issue of the journal Nature add to a growing body of evidence that points to recent liquid water and present vast stores of underground ice near the planet