image: This is a photo of a freshwater stickleback. Rapid changes: marine and freshwater sticklebacks show striking differences since they started diverging roughly 10,000 years ago. This image relates to an article that appeared in the Dec. 10 issue of Science Express, published by AAAS. The study, by Yingguang Frank Chan and colleagues was titled, "Adaptive Evolution of Pelvic Reduction in Sticklebacks by Recurrent Deletion of a Pitx1 Enhancer." view more
Credit: Photo by Frank Chan