By 1974, the controversy surrounding Velikovsky's work had reached the point where the American Association for the Advancement of Science felt obliged to address the situation, as they had previously done in relation to UFOs, and devoted a scientific meeting to Velikovsky. The meeting featured, among others, Velikovsky himself and Carl Sagan. Sagan gave a critique of Velikovsky's ideas and attacked most of the assumptions made in "Worlds in Collision". His criticism is published in "Scientists Confront Velikovsky" (Ithaca, New York, 1977), edited by Donald Goldsmith, and presented in a revised and corrected version in his book ' and is much longer than that given in the talk. Sagan further critiqued Velikovsky's ideas in his PBS television series '. In "Cosmos", Sagan also criticizes the scientific community for their attitude toward Velikovsky, stating that while science is a process in which all ideas are subject to a process of extensive scrutiny before any idea can be accepted as fact, the attempt by some scientists to suppress outright Velikovsky's ideas was "the worst aspect of the Velikovsky affair."