Polonium is back in the news as Palestinian leader Yasser Arafat's wife says Swiss forensic tests show he was poisoned to death by it in 2004. Here are five things to know about the radioactive ...

All the assassin had to do was put the odorless polonium in Litvinenko's green tea. From the moment he took his first sip, he was doomed. Alexander Litvinenko died in 2006 of poisoning from polonium.

British police have concluded that a former Russian spy was poisoned by a lethal dose of radioactive Polonium-210 added to his tea at a London hotel, British and American television stations ...

It was initially thought Mr Litvinenko, 43, had been poisoned during a meeting with his Italian contact, Mario Scaramella. The Itsu Sushi bar did show traces of polonium 210, but not where the two ...

Polonium-210 is a highly radioactive material made in a nuclear facility. ... On that November afternoon, it was dropped into Litvinenko's cup of green tea by two secret agents.

Why - and what is polonium-210? ... He was poisoned by a "major dose" of the radioactive substance polonium-210, contained in a cup of tea, killing him three weeks later.

Roman emperors had praegustators and the Turkish president has lab tests, but human food tasters are still employed to protect world leaders from poisoned food ...

In 2006, Russian spy-turned-dissident Alexander Litvinenko died an agonising death after drinking green tea laced with polonium-210. Starting with diarrhoea and vomiting, ...