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
Marie Curie In the film, Marie Curie was played by Isabelle Huppert. Curie is the subject of the play "False Assumptions" by Lawrence Aronovitch, in which the ghosts of three other women scientists observe events in her life. Curie has also been portrayed by Susan Marie Frontczak in her play "Manya: The Living History of Marie Curie", a one-woman show performed in 30 US states and nine countries, by 2014. Curie's likeness also has appeared on banknotes, stamps and coins around the world. She was featured on the Polish late-1980s 20,000-"złoty" banknote as well as on the last French 500-franc note, before