I love this six-panel summary of the evolution of American comics by the excellent Matt Madden which goes along with Professor Paul Lopes’ interesting article on Colgate Connect about the changing face of comics over the years and how they have been portrayed in other media, especially film:

Comics and cartoons, Matt Madden, Paul Lopes
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Joe - who has written 8204 posts on The Forbidden Planet International Blog.
A professional bookseller for over 20 years and lifelong reader and reviewer, especially of comics and science fiction works, Joe is the editor of the Forbidden Planet blog, which he set up in 2005.
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Tue, Aug 7, 2012
Comics and cartoons