Marie Curie theory of "radioactivity" (a term that she coined), techniques for isolating radioactive isotopes, and the discovery of two elements, polonium and radium. Under her direction, the world's first studies into the treatment of neoplasms were conducted using radioactive isotopes. She founded the Curie Institutes in Paris and in Warsaw, which remain major centres of medical research today. During World War I, she developed mobile radiography units to provide X-ray services to field hospitals. While a French citizen, Marie Skłodowska Curie, who used both surnames, never lost her sense of Polish identity. She taught her daughters the Polish language and took
Madame Curie (film) mention of Marie's intense devotion to politics and the liberation/independence of her native Poland. Author James Hilton was the narrator for this film. According to MGM records the film earned $2,575,000 in the US and Canada and $2,035,000 elsewhere resulting in a profit of $1,086,000. The film is recognized by American Film Institute in these lists: "Madame Curie" was satirized in a 1976 episode of "SCTV" as "Madame Blitzman" (mistakenly shown on 'Monster Chiller Horror Theater') in which Frances Blitzman/Marie Curie (Andrea Martin) works alongside her husband Louis Blitzman/Pierre Curie (Eugene Levy) in creating a life-extension formula derived from radiation