"Bananas are radioactive. That tidbit of information has likely crossed your path before. The yellow, phallic fruit is filled with potassium, a naturally radioactive element. So iconic are bananas as a source of radiation that they inspired their own unit of measurement, the banana equivalent dose, which is roughly 0.1 microsieverts of ionizing radiation." "But did you know your coffee is radioactive, too? It's true. In fact, on a weighted basis, the average coffee powder is roughly three times as radioactive as bananas! If you feel like you're glowing and abuzz after your morning brew, it may not be due to the caffeine..."