LONDON The deadly radioactive element polonium first hit the headlines when it was used to kill KGB agent-turned-Kremlin critic Alexander Litvinenko in London in 2006. Scientists at Switzerland's ...

An Italian intelligence expert who was one of the last people to see a former KBG agent alive before he died of radiation poisoning has tested positive for the same poison, according to British media.

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LONDON - Polonium was discovered by Polish chemist Marie Sklodowska Curie in 1898. It can represent a radiation hazard if it is taken into the body -- by breathing it, eating it, or if it gets into a ...