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We Can Thank Plutonium for Everything We've Learned About Pluto

Our epic journey to Pluto has been filled with cosmic coincidences. Crossing Neptune’s orbit 25 years to the day after Voyager 2. Zipping by Pluto 50 years on the nose after our first Mars encounter. But my favorite serendipitous fact of all has to do with how we’ve powered the entire New Horizons mission—using none…

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