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Bananas are radioactive [Random Knowledge #44]
posted April 17 2013 19:17.38 by Giorgos Lazaridis

Bananas contain high levels of potassium. Radioactive K-40 has an isotopic abundance of 0.01% and a half-life of 1.25 billion years. The average banana contains around 450 mg of potassium and will experience about 14 decays each second. Don't worry though - your body already contains this element and it can handle low levels of radioactivity. As a matter of fact, it is essential for proper nutrition. The only problem that may happen with bananas is when large trucks with tons of bananas go trough the customs and they set off the radiation alarms...

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