Tour of the Universe was a space shuttle simulation ride located in the basement level of the CN Tower. Operating between 1985 and 1990, it was the world's first flight simulator ride. The ride was the idea of Moses Znaimer and designed by SimEx. The name of the ride, Tour of the Universe, and its content were adapted from a work of the same name cowritten in 1980 by Robert Holdstock and Malcolm Edwards, who sold the rights for the ride. The ride was replaced in 1991 with a similar attraction entitled "Space Race." It was later dismantled and replaced by two other SimEx rides in 1998 and 1999.