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New top story on Hacker News: But why is a sphere's surface area four times its shadow? [video]

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New top story on Hacker News: But why is a sphere's surface area four times its shadow? [video] New top story on Hacker News: But why is a sphere's surface area four times its shadow? [video] Reviewed by Qamar javed on December 03, 2018 Rating: 5

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