image: An Anolis sagrei lizard clings to a tree branch in order to evade predators. This image relates to an article that appeared in the 17 November 2006 issue of the journal Science, published by AAAS. The study, by Dr. Jonathan Losos of Washington University in St. Louis and colleagues, was titled "Rapid Temporal Reversal in Predator-Driven Natural Selection." view more
Credit: Photo provided by Jonathan B. Losos, Washington University, via <i>Science</i>-AAAS.