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Math & Theory 357 of 360 Next video
21:25

Outside In

ssgelm·Length: 21 minutes21:25·Pure mathematics

In brief

A 21-minute animation showing how a sphere can be turned inside out without creases or tears, known as sphere eversion.

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All 360 videos

Videos, their order and the “In brief” summaries come from the “Mathematics & Theoretical CS” area of HackerTube (data exported 2026-10-31, checked 2026-11-09). That data is licensed under ODC-By 1.0 and derived from the open-index/hacker-news dataset. Hacker News data is provided by Y Combinator.

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