Joe Ruby, co-creator of beloved animated characters including Scooby-Doo, has died of natural causes. Via Variety, he was 87 years old. Along with his writing partner Ken Spears, Ruby helped establish Hanna-Barbera’s voice and redefined Saturday morning cartoons. They created such beloved children’s series as Scooby-Doo, Where Are You!, Dynomutt, Dog Wonder, Jabberjaw, The Barkleys, and The Houndcats. Later, Ruby-Spears Productions executive produced animated series like Superman, Mr. T., Alvin and the Chipmunks, Thundarr the Barbarian, and more. Born March 30th, 1933, Ruby began his career at Walt Disney, where he worked as an inbetweener: an assistant animator charged with drawing intermediate images between key frames. After a stint in the US Navy, Ruby eventually la...