Isaac Asimov (1920–1992), one of the best-known and most successful authors to emerge from the golden age of science fiction, 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 series; 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.