How to stack fruit in a grocery store: Kepler’s 400-year-old theory confirmed by computer.

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

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.