Why humidity turns your hair into a human hygrometer

Why Does Hair Get Frizzy When It's Humid? · 4:19 · Video: SciShow · Watch at the source

In short: Ever wondered why high humidity ruins your hairstyle? This video explores the science behind hair frizz and why your hair reacts so visibly to the moisture in the air.

When humidity levels rise, hair can become frizzy as it reacts to the moisture in the environment. This phenomenon essentially turns your hair into a human hygrometer, a device used to measure humidity.

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