The amazing mountains on Pluto

NASA mission scientist John Spencer explains what can be learned from new images of Pluto taken by the New Horizons probe. The first close-up image of Pluto's surface shows a terrain that had been resurfaced by some geological process - such as volcanism - within the last 100 million years. The image shows mountains, made of water-ice, at the edge of the heart-like region that are up to 11,000ft (3,300m) high and which team members compared to North America's Rocky Mountains.


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