The Icy Mountains of Pluto

Explanation: Close-up images of a region near Pluto's equator reveal a giant surprise: a range of youthful mountains rising as high as 11,000 feet (3,500 meters) above the surface of the icy body. The mountains likely formed no more than 100 million years ago - mere youngsters relative to the 4.56-billion-year age of the solar system - and may still be in the process of building.

Pluto

Image credit: NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute.