I have proposed that two models of evolution need to be considered: Darwin's natural evolution and designed evolution. Theoretically modification of mutations should allow evolution to reverse course. That is not what the record shows. It progresses to complexity, as if designed to do that. A new paper now shows that if one tries to reverse course at the molecular level, it won't work. It appears evolution cannot go backyard, although theoretically it should, being a random purposeless process (per Darwinism). The second link is a longer and more complete discussion. And finally a third link. Each gives differing quotes from some of the scientist's interpretations. An extremely important study!- http://sciencenow.sciencemag.org/cgi/content/full/2009/923/1-http://www.sciencedaily.co...