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By interfering at the molecular level, researchers were able to produce a chicken embryo with a velociraptor-like snout in place of a beak. Below you'll find an artist's interpretation.

This image shows the skulls of three animal embryos. On the left is a chicken skull, and on the left is an alligator skull. The skull in the middle is from a chicken embryo produced by a team of scientists including Bhart-Anjan Bhullar of Yale and Arhat Abzhanov of Harvard. They are the lead authors of a new study in the journal Evolution entitled "A molecular mechanism for the origin of a key evolutionary innovation, the bird beak and palate, revealed by an integrative approach to major transitions in vertebrate history."

Sources: BBC