The body of the former Palestinian leader Yasser Arafat will be exhumed on Tuesday to test to see if he was the victim of Polonium-210 poisoning.
Polonium was first discovered by Marie and Pierre Curie in 1898. It is a radioactive element that occurs naturally in the earth's crust.
According to scientists from the University of Chicago Polonium-210 is traditionally used to clear dust from camera lenses or photographic film.
It is poisonous if ingested and it's believe that the Russian dissident Alexander Litvinenko who died in November 2006 was the victim of Polonium-210 poisoning.
More top news
A whisky advert featuring David Beckham has been cleared by the advertising regulator.
Councils will have to cut money from services such as libraries because of the rising cost of caring for the elderly, a new report warns.
A Branislav Ivanovic header in extra-time ensured that Chelsea are through to the Capital One Cup Final after beating Liverpool