this post was submitted on 30 Jul 2025
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Today I Learned (TIL)

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TIL that bananas are naturally radioactive due to potassium-40, and the small radiation they emit is so well-known that scientists use the "banana equivalent dose" as unit to explain everyday radi... (en.wikipedia.org)
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The original was posted on /r/todayilearned by /u/summitseeker91 on 2025-07-30 03:12:47+00:00.

Original Title: TIL that bananas are naturally radioactive due to potassium-40, and the small radiation they emit is so well-known that scientists use the "banana equivalent dose" as unit to explain everyday radiation exposure. Looks like bananas are used for scale in more than one way!

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