Animation writer and executive, Joe Ruby, who co-created Scooby-Doo has died.

He died of natural causes on Wednesday at the age of 87.

His grandson said he never stopped writing and creating even as he aged.

Scooby-Doo launched in 1969.

He was also responsible for Alvin and the Chipmunks, Thundarr the Barbarian and more.

What was your favorite Saturday morning cartoon when you were younger?

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