Nobel Prize relevant fields was greater), a greater delay in awarding Nobel Prizes for women's achievements making longevity a more important factor for women (Nobel Prizes are not awarded posthumously), and a tendency to omit women from jointly awarded Nobel Prizes. Four people have received two Nobel Prizes. Marie Curie received the Physics Prize in 1903 for her work on radioactivity and the Chemistry Prize in 1911 for the isolation of pure radium, making her the only person to be awarded a Nobel Prize in two different sciences. Linus Pauling was awarded the 1954 Chemistry Prize for his research into the chemical
Nobel Prize in Literature of the gesture. He was a candidate for the Nobel Prize in 1904, to be shared with the Provençal writer Frédéric Mistral, in recognition of their contributions to literature in non-official languages. Political pressure from Spain's central government having made this prize impossible, it was eventually awarded to Mistral and to the Spanish language playwright José Echegaray. The choice of Selma Lagerlöf (Sweden 1858–1940) as Nobel Laureate in 1909 (for the 'lofty idealism, vivid imagination and spiritual perception that characterizes her writings') followed fierce debate because of her writing style and subject matter, which broke literary decorums of the time.