Otto Hahn was a German chemist born on March 8, 1879, in Frankfurt am Main. He is best known for his pioneering work in nuclear chemistry, particularly for discovering nuclear fission in 1938 alongside Lise Meitner. This groundbreaking discovery laid the foundation for the development of nuclear energy and atomic bombs. Hahn's contributions to science earned him the Nobel Prize in Chemistry in 1944. Despite his significant achievements, he faced moral dilemmas regarding the use of nuclear technology during and after World War II. Hahn continued to advocate for peaceful uses of nuclear energy until his death on July 28, 1968.