The surface appears to be extremely young. There are no craters on these mountai... | Hacker News

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nerfhammer on July 16, 2015 | parent | context | favorite | on: The Icy Mountains of Pluto

The surface appears to be extremely young. There are no craters on these mountains. They're apparently made of ice and are relatively tall.

http://www.nytimes.com/2015/07/16/science/pluto-flyby-photos...

"But these mountains are almost certainly made of frozen water instead of rock."

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