It Took 400 Years, but an Old Math Puzzle Is Finally Confirmed (Video)

Slate in motion.
Aug. 18 2014 12:23 PM

What’s the Best Way to Stack Spherical Objects?

A 400-year-old theory, finally confirmed.

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A worker sleeps near watermelons arranged like pyramids at a market in Manila on December 26, 2013. Filipinos believe that displaying 12 different round-shaped fruits - one representing each month of the year - at home before New Year's Day welcomes prosperity. AFP PHOTO/NOEL CELIS (Photo credit should read NOEL CELIS/AFP/Getty Images)

Photo by NOEL CELIS/AFP/Getty Images

A 300-page proof of a 400-year-old problem has finally been confirmed ... by computer.

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