28th March 1979: Worst accident in U.S. nuclear power plant history at Three Mile Island Generating Station

The incident at Three Mile Island heralded a dramatic shift in public attitudes towards nuclear power and the second reactor never returned to service.

20th April 1902: Marie and Pierre Curie prove the existence of radium

Marie and Pierre Curie proved the existence of the new element radium when they chemically isolated one-tenth of a gram of pure radium chloride.