Many substances we face today are a by-product of technology. No animals have encountered them before. For example: pesticides and food additives. By contrast, radiation has always been present. The amount of radiation has been added to by man-made devices.

What is Radiation?

Radiation is the flow of energy through space and matter. Some examples of radiation are visible light, radio waves, and radiant heat.

Radiation can be in the form of particles or waves.

Ionizing radiation is radiation that produces ions in matter. It is able to disrupt chemical bonds of molecules and cause biologically important changes.