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Human Body Weirdness

Humans Glow — You Just Can't See It

Your body emits a faint visible light, strongest on your face at 4pm.

Fact-checked · 2 verified sources

Reviewed by the CurioVault curator · 8 October 2026 · Editorial standards

Humans Glow — You Just Can't See It — AI illustration
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Japanese scientists proved in 2009 that humans emit a faint visible light, most at 4pm. Our faces glow most. The light is from chemical reactions in our cells. Cameras can capture it, eyes can't.

Test yourself · 3 questions

Were you paying attention?

  1. 1. Which group of scientists proved in 2009 that humans emit a faint visible light?

  2. 2. At what specific time of day do humans emit the most light?

  3. 3. According to the article, which part of the human body glows the most?

Tagged

#anatomy#biology#light

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