Witness the evolution of the Simpsons:
In the beginning, there was the Tracey Ullman Show. The show’s producers said “let there be a funny recurring cartoon series”, and there was a funny recurring cartoon series and it was good.
After being good on the Tracey Ullman Show, The Simpsons continued to be good as a half-hour long show on Fox, where the characters evolved into their familiar present day form:
As long as people and culture change, cultural (or memetic) selection goes on. Based on indepth analysis of cultural trends, a crack team of cultural analysts have speculated on the direction in which Simpsonian evolution is heading:
(Click image to enlarge)
(Picture Credit: http://spacecoyote.deviantart.com/art/The-Simpsonzu-46036660)
As of yet, there have been no speculations of intermediate transitional forms.