Freeman Dyson, one of the world's most eminent theoretical physicists, recently celebrated his 90th birthday. Born in England on 15 December 1923, Freeman Dyson graduated from Cambridge University in 1945 with a BA in mathematics. In 1947, he moved to the USA where he went to work at Cornell University and, later, at the Institute for Advanced Study in Princeton. Professor Dyson is a member of the GWPF’s Academic Advisory Council. On the occasion of his 90th birthday, we republish an CCNet-interview he gave Benny Peiser in March 2007.