Before the rise of basic cable and syndication, Saturday mornings for many children in America consisted of watching cartoons on TV on one of three available channels. From 1958 through the 1980s, a vast majority of those cartoons bore the Hanna-Barbera (1957-2001) imprint. Creating hit shows such as The Flintstones, Scooby-Doo, Jonny Quest, Super Friends, and The Smurfs, Hanna-Barbera was an animation powerhouse. Hanna-Barbera Productions was formed in 1957 by William Hanna and Joseph Barbera, who had been partners in animation at MGM Studios where they created the memorable Tom and Jerry shorts. They left MGM when the studio stopped production on animated films. Hanna and Barbera achieved immediate success on television with The Huckleberry Hound Show in 1958, followed later by the highly popular prime-time series, The Flintstones. Through the next thirty years, Hanna-Barbera produced an astonishing 249 individual cartoon series for television—totaling over 1,200 hours of original episodes. When Cartoon Network was formed in 1992, Hanna-Barbera supplied most of the cartoons. Hanna-Barbera was eventually absorbed by Warner Bros., but the cartoons remain available in syndication and on DVD. The impact of Hanna-Barbera’s cartoons is evident in today’s popular culture, from Fred Flintstone hawking Fruity Pebbles cereal to numerous parodies on TV's Family Guy cartoon to the live-action Smurfs films to the continued creation of new Scooby-Doo television series, comic books, and animated and live-action movies.