Sand Dunes

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NASA's Mars Reconnaissance Orbiter finds origin of sand on the red planet
News & Analysis

NASA's Mars Reconnaissance Orbiter finds origin of sand on the red planet

The fact that we see active sand dunes on Mars today requires that sand particles must be resupplied to replace the grains that are lost over time.

Saturn's moon Titan has sticky electrically charged sand that lets you build sandcastles without water
News & Analysis

Saturn's moon Titan has sticky electrically charged sand that lets you build sandcastles without water

The particles that cover the surface of Saturn's largest moon, Titan, are "electrically charged", show results of an experiment