Rise of Anti-Evolution Bills: UPDATE

PhysOrg also has a post on this research that includes an animated GIF to show the progression.  From the post:

The study also found that antievolution bills show evidence of 'descent with modification,' suggesting that anti-evolutionist legislators copy bills recently proposed or passed, rather than writing new bills from scratch. In addition, although the antievolution bills usually avoid mentioning creationism, most could be tied directly to creationism through statements in the legislation or by the bills' sponsors.

"Creationism is getting stealthier in the wake of legal defeats, but techniques from the study of evolution reveal how creationist legislation evolves," Matzke said.

I will be curious to see how the Discovery Institute spins this.