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How Many Holes Does a Human Have?

Vsauce · explainer · Watch on YouTube

Pure mathematicsRecreational & visual math

What it is

Vsauce asks how many holes a human has and uses topology to show the answer depends on what counts as a hole, with animations and expert input.

Why Hacker News recommends it

Pointed to as a fun, light introduction to topology and to answer the human-holes question.

  • 3 people recommended it
  • 3 different months
  • 0 strong recommendations
  • first 2021, last 2024

What HN commenters said

  1. “If you'd like a fun, light, video introduction to this topic, this Vsauce video is worth a watch”

    Fun, light video introduction to topology and holes

    thearrow, 2021-01 · Recommendation · in “Topology 101: How Mathematicians Study Holes”

  2. “Check out the video from VSauce on YouTube about how many holes a human has.”

    Explores how many holes a human has depending on what counts as a hole

    dsamarin, 2021-05 · Recommendation · in “The anus is an evolutionary marvel”

  3. “Vsauce has an interesting video regarding topology[0]. Probably a bit rudimentary for anyone already familiar with the math, but still entertaining”

    Entertaining, somewhat rudimentary introduction to topology

    davkan, 2024-02 · Recommendation · in “'Entropy bagels' and other complex structures emerge from simple rules”

Excerpts from Hacker News comments, linked to the originals. Summaries and labels were written by a language model from those comments.

Topics: topology, holes, genus, mathematics, anatomy

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