Audio long-read: Plutos dark side is overflowing with secrets
In 2015, after a nine-and-a-half-year journey, NASA\u2019s New Horizons spacecraft raced past Pluto, beaming images of the dwarf planet back to Earth.
Five years after the mission, researchers are poring over images of Pluto\u2019s far-side, which was shrouded in shadow during New Horizon\u2019s flypast. They hope that these images will help give a better understanding of how Pluto was born and even whether a hidden ocean resides beneath the world\u2019s icy crust.
This is an audio version of our feature: Pluto\u2019s dark side spills its secrets \u2014 including hints of a hidden ocean
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