Background radiation is the invisible radiation that is always present in our environment. It comes from a variety of sources, both natural and man-made. Natural sources include cosmic rays from space ...

A newly published study of the radiation doses received by Fukushima residents has concluded that most people in the prefecture are unlikely to receive doses significantly different to normal ...

The cesium-137 inside emits about 2 millisieverts per hour, which is the same dose as 10 medical X-rays or an entire year of normal background radiation at sea level. Share on Facebook (opens in a new ...