Radiation is everywhere. Some naturally occurs in gases, such as radon, released from the ground. Some comes from the sun. And some is man-made in the form of X-rays, radio waves and nuclear power.

An illustration titled 'What Radioactivity Is', with six panels' reading (top) 'Water in pond is 'stable,' it expends no energy,' water can be carried up-hill and its energy level raised,' 'as it runs ...

WASHINGTON Even very low doses of radiation pose a risk of cancer over a person's lifetime, a National Academy of Sciences panel concluded. It rejected some scientists' arguments that tiny doses are ...

(Reuters) - Radiation levels in Japan remained a huge worry on Wednesday following explosions and fires at the Fukushima power plant. But there has been no indication that people away from the plant's ...

Bdelloid rotifers shrug off radiation doses that would obliterate human cells. Here’s how their resilience reveals deep ...

March 15 (Reuters) - Health experts urged governments in the Asia Pacific to monitor radioactivity levels after Japan's quake-damaged nuclear power plant exploded and sent radiation into the air.