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Pluto Challenges Scientists, 75 Years Later
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Pluto Challenges Scientists, 75 Years Later

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Pluto Challenges Scientists, 75 Years Later

Pluto Challenges Scientists, 75 Years Later
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  • <iframe src="https://www.npr.org/player/embed/4504364/4504365" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">

Seventy-five years ago, astronomer Clyde Tombaugh discovered the planet Pluto at Lowell Observatory in Flagstaff, Ariz. Today, scientists in Flagstaff are still hard at work, researching Pluto's mysteries. Sadie Babits of Arizona Public Radio reports.

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