George Gamow, a theoretical physicist and cosmologist and an early advocate and developer of Lemaître's Big Bang theory. was awarded the Kalinga Prize by UNESCO for his popularization of science. Born in Odessa, Russia, he was a colleague of Albert Einstein, Marie Curie, Peter Kapitza and Francis Crick. He was a fellow at Cambridge, Univ. of Copenhagen, Univ. of Leningrad, Univ. of London, Washington Univ. (Wash., DC), Univ. of California, Berkeley, and Univ. of Colorado. My World Line is an intimate portrait of an unorthodox, witty and warm man, whose free spirit and creative intuition endeared him to his colleagues in the scientific community.