Referenced in an article by Zimmer in BBC Knowledge magazine about Richard's Lenski's work with E.coli bacteria. He set up 12 identical lines in separate flasks 21 years ago and then watched them evolve. Some really interesting stuff happened including one line's ability to use citrate for sustenance something E. coli could not do. His work is giving the creationists fits because it's living proof of the mechanism of evolution and natural selection. Full article in Mar/Apr 2009 issue of BBC Knowledge "Evolution in Action"
References:http://www.actionbioscience.org/evolution/lenski.html
