Tuesday - September 22, 2026
Mercury may have shrunk by more than 10 kilometers over its history
September 10, 2026
HOKKAIDO, Japan, Sept. 10 -- Hokkaido University posted the following news release:

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Mercury may have shrunk by more than 10 kilometers over its history

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Previous studies may have underestimated how much Mercury has contracted as the planet cooled over billions of years because its rough surface hides some of the geological evidence.

The surface of Mercury is filled with craters, ridges, and steep cliffs. Over billions of yea . . .

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