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 Memorial Prize in Economic Sciences ... shall have conferred the greatest benefit on mankind." According to its official website, the Royal Swedish Academy of Sciences "administers a researcher exchange with academies in other countries and publishes six scientific journals. Every year the Academy awards the Nobel Prizes in Physics and in Chemistry, the Sveriges Riksbank Prize in Economic Sciences in Memory of Alfred Nobel, the Crafoord Prize and a number of other large prizes". Each September the Academy's Economics Prize Committee, which consists of five elected members, "sends invitations to thousands of scientists, members of academies and university professors in numerous countries, asking them to