Nuclear winter (also known as atomic winter) is a hypothetical climatic effect of countervalue nuclear war. Models suggest that detonating dozens or more nuc.\n\nCarl Sagan interviews the Dalai Lama on God & Science.\n\nSpace exploration is the discovery and exploration of outer space by means of space technology. Physical exploration of space is conducted both by human spac.\n\nCarl Sagan comments on the nuclear arms race on ABC News Viewpoint - The Day After in 1983.\n\nThis is the another simulation of world war three.\n\nPeter Gzowski of CBC radio's Morningside interviews Carl Sagan on January 20