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Tuesday, April 23, 2024
Home The colored dots represent sites where bright radar reflections have been spotted by ESA’s Mars Express orbiter at Mars’ south polar cap. Such reflections were previously interpreted as subsurface liquid water. Their prevalence and proximity to the frigid surface suggests they may be something else. (ESA/NASA/JPL-Caltech) The colored dots represent sites where bright radar reflections have been spotted by ESA’s Mars Express orbiter at Mars’ south polar cap. Such reflections were previously interpreted as subsurface liquid water. Their prevalence and proximity to the frigid surface suggests they may be something else. (ESA/NASA/JPL-Caltech)

The colored dots represent sites where bright radar reflections have been spotted by ESA’s Mars Express orbiter at Mars’ south polar cap. Such reflections were previously interpreted as subsurface liquid water. Their prevalence and proximity to the frigid surface suggests they may be something else. (ESA/NASA/JPL-Caltech)

The colored dots represent sites where bright radar reflections have been spotted by ESA’s Mars Express orbiter at Mars’ south polar cap. Such reflections were previously interpreted as subsurface liquid water. Their prevalence and proximity to the frigid surface suggests they may be something else. (ESA/NASA/JPL-Caltech)

The colored dots represent sites where bright radar reflections have been spotted by ESA’s Mars Express orbiter at Mars’ south polar cap. Such reflections were previously interpreted as subsurface liquid water. Their prevalence and proximity to the frigid surface suggests they may be something else. (ESA/NASA/JPL-Caltech)

ESA’s (the European Space Agency’s) Mars Express flies over the Red Planet in this illustration. NASA’s Jet Propulsion Laboratory supplied the receiver for the mission’s Mars Advanced Radar for Subsurface and Ionospheric Sounding (MARSIS) instrument. (ESA/NASA/JPL-Caltech)