Marie's daring hypothesis that rays emitted might be a basic property of uranium atoms had radical implications. It would revise the scientific understanding of matter at its most basic level ("The Passion of Madame Curie" 3). Curie began doing experiments on uranium-produced radiation and on other elements to see if they produced emissions. Marie discovered that the ability to radiate did not depend on the atom's arrangement in a molecule, but on the atom itself. She then went through the whole periodic system and found that uranium and thorium gave off this radiation ("Marie and Pierre Curie and the Discovery of Polonium and Radium" 4). She proved the existence of radioactive elements and isolated two new elements. In 1898 she identified one of the substances and named it polonium after her homeland. She then discovered radium five months after. Curie described the elements as radioactive, which meant they could emit radiation. Maire and Pierre soon received international recognition for their work. The early work of Marie and Pierre Curie also led immediately to the use of radioactive materials in medicine.
"I never see what has been done; I only see what remains to be done."- Marie Curie