Isaac Asimov (1920-1992) was born in the Soviet Union and came to the United States in 1923. He earned his PhD in chemistry in 1948, and in 1958 became a full-time writer. His writings include the Foundation Trilogy; I, Robot; Tomorrow's Children; and numerous works of nonfiction touching on a range of scientific topics. Among his accolades are six Hugo awards, a SFWA Grand Master Award, and high praise from such luminaries as Kurt Vonnegut, Arthur C. Clarke, and Gene Roddenberry.