Polonium: A little goes a long way

Whether a radioactive substance called polonium-210 was involved in Yasser Arafat's death is under investigation. The body of the former Palestine Liberation Organization leader was exhumed Tuesday for this purpose and reburied.

Source: http://edition.cnn.com/2012/11/27/health/polonium-arafat-explainer/index.html?eref=edition

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