Your toothbrush is worn-out!
What it is
Ben Krasnow of Applied Science uses a scanning electron microscope to compare new and worn toothbrush bristles. He shows how the microscopic texturing wears down with use.
Why Hacker News recommends it
HN commenters link it for electron micrographs of fresh versus worn bristles when toothbrush wear comes up.
- 1 people recommended it
- 1 different months
- 0 strong recommendations
- first 2023, last 2025
What HN commenters said
“You might be interested in this YouTube video from Applied Science with electron micrographs of 'new' and 'worn' toothbrush bristles”
Electron micrographs of new versus worn toothbrush bristles
error503, 2023-05 · Recommendation · in “Hacking a Philips Sonicare Toothbrush”
Excerpts from Hacker News comments, linked to the originals. Summaries and labels were written by a language model from those comments.
Topics: electron microscope, toothbrush, materials, applied science, microscopy
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