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Mars Rover Opportunity Examines Clay Clues in Rock

Rock Target 'Esperance' Altered by Wet History (False Color)

NASA's senior Mars rover, Opportunity, is driving to a new study area after a dramatic finish to 20 months on "Cape York" with examination of a rock intensely altered by water.

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Galaxy's Ring of Fire

This ring of fire "burns, burns, burns" with young stars.

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NASA Helps Pinpoint Glaciers' Role in Sea Level Rise

A new study of glaciers worldwide from two NASA satellites has helped resolve differences in estimates of how fast glaciers are disappearing and contributing to sea level rise.

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