Radiation is everywhere. Of course, not harmful, nuclear-disaster-levels of radiation, but every day we're exposed to radiation from different sources. It just happens to not be strong enough, or we're not exposed to it for long enough, to cause any damage. Indeed, radiation has been successfully used in numerous fields, from medicine to agriculture and energy, among others.
But while some of this radiation comes from obvious things such as the Sun, where else does it come from? Click on to find out.