- Liquid nitrogen may have recently flowed across Pluto’s heart-shaped glacier Phys.org
- NASA’s New Horizons Finds Evidence of Recent Liquid on Pluto’s Surface NASA Science (.gov)
- Scientists find strange movement on Pluto in images that came to Earth in 2015 India Today
- Liquid nitrogen is flowing across Pluto’s heart-shaped glacier Tech Explorist
- Pluto was expected to be a frozen, cratered relic, but when New Horizons flew past in 2015 it found flowing nitrogen glaciers, mountains of water ice and hints of a hidden ocean, on a world where the Sun looks like just a bright star Space Daily
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