Isaac Asimov

Earth Is Room Enough is a collection of seventeen short science fiction and fantasy stories and two pieces of comic verse published by Isaac Asimov in 1957. In his autobiography In Joy Still Felt, Asimov wrote, "I was still thinking of the remarks of reviewers such as George O. Smith . . . concerning my penchant for …

Extraterrestrial Civilizations is a book written by Isaac Asimov in 1979, wherein the probability of there being intelligent extraterrestrial civilizations within the Milky Way galaxy is estimated. This estimation is approached by progressively analyzing the requirements for life to exist.