“Scientists have rewound 65 million years of evolutionary history by tweaking chicken DNA to create embryos that grow alligator-like snouts rather than beaks.”

“Chickens and other birds are thought to have descended from dinosaurs through a series of genetic changes.

But by altering the DNA of chicken embryos in the early stages of their development, scientists are able to undo the progress made by evolution and give them qualities they lost millions of years ago.”

http://www.telegraph.co.uk/science/evolution/8707125/Scientists-reverse-evolution-with-snouted-chicken.html