Our latest experiments have shown a very striking fact: when an aluminium foil is irradiated on a polonium preparation, the emission of positrons does not cease immediately, when the active ...

She suspected the presence of an even more powerful element. MARIE-NOELLE HIMBERT: Here, Po, Polonium is the first element that they discovered. CHRIS PACKHAM: It’s remarkable, isn’t it?

Former Russian spy Alexander Litvinenko died in a London hospital in 2006, after drinking tea poisoned with the highly radioactive material - polonium. But who wanted him dead, and why?