Pluto must harbor a wellspring of internal heat to keep from freezing solid, something researchers didn’t anticipate before the arrival of New Horizons. New Horizons revealed Pluto as a mysterious world with icy mountains and very smooth plains. Credit: NASA So, what is Pluto’s ocean like? How thick are Pluto’s ice sheets? Are any of Pluto’s suspected cryovolcanoes still active …
Read More »We saw the heart of Pluto 10 years ago—it’ll be a long wait to see the rest
