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
2007 Nobel Peace Prize work and application." In Oslo on 10 December 2007, the presentation was made with a speech by Ole Danbolt Mjøs as Chairman of the Norwegian Nobel Committee, and followed by Nobel Lectures given by Rajendra K. Pachauri, representing the IPCC, and Al Gore. In his lecture, Pachauri thanked those contributing to the IPCC: The IPCC presented scientists who had "contributed substantially to the preparation of IPCC reports" with personalized certificates for "contributing to the award of the Nobel Peace Prize for 2007 to the IPCC". The certificates, which name the individual and feature a reproduction of the Nobel Peace Prize