Why Do Escalator Steps Have Teeth?

Plus, our viewers get 20% off an annual Premium subscription for unlimited daily access to all Brilliant courses. A massive thank you to Emily Zhang for suggesting this idea and helping shape it. A huge thanks to the team at OTIS, especially Ed Jacovino, Gregory Sefcik and Dirk Winkelhake, for their time and expertise. Thank you also to Professor Gero Gschwendtner, Professor Michael Fu, and Dr. Peter Kauffmann for all their help on the project.

Courtesy of Veritasium on YouTube. Watch on YouTube ↗

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