Hall gallery
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Radioactivity is all around us.
Cat litter and radiation detectors
Some sensitive detectors at borders have been triggered by ordinary cat litter.
This is because natural materials can contain small amounts of radioactive elements.
Radioactive alarm clocks
Old luminous alarm clocks contained radium, which glowed on its own without electricity. Today, more advanced materials are used such as phosphorescent paints.
Radioactive banana
A banana contains natural potassium with the isotope 40K, so even an ordinary snack naturally emits a small amount of radiation.