an experimental experience

1/28/26 at 12:23pm

Organization

Boing Boing

Author

Ellsworth Toohey

31 words

Comments

Two doughnut-shaped surfaces look completely different but share identical measurements. It took 150 years to find them.

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https://boingboing.net/2026/01/28/two-twisty-doughnut-shapes-solve-a-150-year-old-geometry-puzzle.html

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