... a process which would be later named natural radiation.) was very interested in the element uranium and the radiation that came from it. She thought that the radiation was coming from an unknown ingredient inside the uranium. One day Marie and Pierre saw a strange blue glow coming from their shed in which they did most of their work and where the element they had called 'radium' was stored, which was, at that time a totally unknown atom. They also discovered another radioactive element called 'polonium' which they named after Poland. Encouraged by Marie's colleague, both Marie and Pierre began work to discover other substances that emitted particle rays. Although Marie was the 'leader' of the project, Pierre gave up some of his classes to help his wife in her project. They began their project by examining uranium ore called pitchblende. In 1903, people began to realise that the work ...

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