Linus Carl Pauling is the only person in the history of Nobel Prize who received the honour twice without sharing it with any other luminary – first for chemistry and second for peace. In 1954, the Royal Swedish Academy of Sciences honoured Pauling for his work into the nature of chemical bonding. In 1962, the American chemist turned peace activist was back on the podium in Oslo to receive Nobel Peace Prize for promoting nuclear disarmament. Foreseeing the danger of a nuclear war he appealed immediate stop on N-bomb testing and gathered signatures of over 8,000 scientists from 49 countries, which translated into the signing of first partial nuclear test ban treaty in 1963.