Radioactivity Is Everywhere

Chances are, there's something radioactive in your home! Learn just how common radioactive items are, then visit the most radioactive places on the planet.

Key Facts In This Video

  1. Bananas are high in potassium, and thus high in the radioactive isotope potassium 40. 00:17

  2. Emergency exit signs are radioactive, because they contain tritium. 01:24

  3. We are bombarded with radiation from the sun at all times. 02:02

Key Facts In This Video

  1. If the human body is exposed to more than two sieverts of ionizing radiation at once, it will die. 00:50

  2. As an airplane gains altitude, the level of radiation inside the plane increases. 05:07

  3. The lungs of smokers are exposed to more ionizing radiation than people living near Fukushima, radiation workers, and astronauts. 09:57

Key Facts In This Video

  1. Airplane passengers are the people most likely to be exposed to dark lightning. 00:22

  2. Dark lightning is an invisible spray of x-rays and gamma rays that can occur at the same time as visible lightning. 00:49

  3. There's approximately one dark lightning flash for every thousand visible lightning flashes. 01:54

Written by Curiosity Staff March 15, 2016

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