Marie Curie (1867-1934), Polish-born French physicist, 1926.

Marie Curie (1867-1934), Polish-born French physicist, 1926. In 1898, Curie and her husband Pierre discovered two new elements, polonium and radium. Marie did most of the work of producing these elements, and to this day her notebooks are still too radioactive to use. In 1904, the Curies and Henri Becquerel were awarded the Nobel Prize for Physics. Curie also was awarded the Nobel Prize for Chemistry in 1911. From An Outline of Christianity, The Story of Our Civilisation, volume 4: Christianity and Modern Thought, edited by RG Parsons and AS Peake, published by the Waverley Book Club (London, 1926). (Photo by The Print Collector/Print Collector/Getty Images)