Now, with the discovery of this 2.5 mile-high mountain on Pluto's surface, planetary scientists are trying to understand how the 90 miles-wide feature formed and whether it could be yet another sign of the small world's surprising dynamism and a striking example of cryovolcanism.
Informally named "Wright Mons," should this huge feature indeed be confirmed to be a cryovolcano it will be the largest such example in the outer solar system. (The inner solar system, of course, is dominated by the Martian mega-volcano Olympus Mons that pushes above the Red Planet's atmosphere, towering 16 miles high.)
Of particular interest in this color image of Wright Mons is the distribution of red material - why isn't it more widespread around Pluto's globe? Also, there appears to be few impact craters around Wright Mons, in fact, there is only one impact crater on the mountain itself. This tells us that if it really is an ice volcano, it had to have been active in recent geological history - if it was an inactive, static artifact, it should be peppered with impact craters. Instead, it appears recently active processes - possibly related to Pluto's ice - have eroded most of the impact craters away.