Richard Lenski published a pivotal paper in 2008 which rigorously demonstrated evolution in a laboratory setting1. Recently, a “controversy” over Lenski’s research backfired, severely discrediting his critics, a group of creationists and intelligent designers whose intellectual and logical abilities are markedly unscientific. The debate has been mirrored here, the mirroring being necessary as the original site has been subjected to frequent revisionist censoring. The critical rebuttal was this reply by Lenski to Andrew Schlafly. An article in the New Scientist blog discusses the brouhaha. Another good discussion can be found at RationalWiki.
1. Z. D. Blount, C. Z. Borland & R.E. Lenski (2008) “Historical contingency and the evolution of a key innovation in an experimental population of Escherichia coli” PNAS 105 7899-7906. -- Eric Kofoid