Acute radiation syndrome (ARS) – also known as radiation poisoning and radiation sickness – refers to illness that is a result of excessive exposure to ionizing radiation. There are many short ...

Litvinenko died of radiation poisoning believed to be caused by the rare isotopepolonium-210 in London on Nov. 23, after saying he began to feel ill on Nov. 1.

LONDON — The FBI is joining the British probe into the poisoning death of a Kremlin critic, the agency announced Thursday as investigators found traces of radiation at a dozen sites in Britain a ...

In 1927, American geneticist Hermann Joseph Muller published research showing genetic effects of radiation, and in 1946 he was awarded the Nobel prize. Radiation poisoning is rare, but deadly.

A lawyer for the suspect who was being questioned for the murder of an ex-Russian spy said that reports his client fell into a coma from the effects of radiation poisoning were false.

• A 2007 study by radiation experts from Britain’s Health Protection Agency concluded that once Polonium-210 is deposited in the bloodstream, its potent effects are nearly impossible to stop.