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What Happened to Early Mars' Atmosphere? New Study Eliminates One Theory


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Nili Fossae plains region of Mars

This view combines information from two instruments on a NASA Mars orbiter to map color-coded composition over the shape of the ground within the Nili Fossae plains region of Mars.

Credit: NASA/JPL-Caltech/JHUAPL/Univ. of Arizona

Scientists may be closer to solving the mystery of how Mars changed from a world with surface water billions of years ago to the arid Red Planet of today.

From Jet Propulsion Laboratory/NASA
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