We all fear radiation yet life depends on it. We each are radioactive, living on a radioactive planet, in a radioactive solar system, in a radioactive universe, in a radioactive galaxy. Radiation can both kill us and cure us.
One may be exposed to elevated levels of radiation by breathing in radioactive particles, ingesting them, or coming into close bodily contact with a source of radiation. Different types of radiation will produce different health effects.
The nuclear catastrophe raging through Japan's nuclear power complex is generating an intense fear of radioactive fallout potentially reaching North America.
Concern is mounting about potential health risks of radiation from the crippled nuclear reactors in Japan. How much radiation you get depends on the d...