How frequently have you thought about birds’ beaks lately? Unless you’re an ornithologist, probably not often. Then again, if you are thinking about birds consume their food, you might wonder, do ...

How did Archaeopteryx relate to today’s birds? Its teeth provide a major clue. Experts are still arguing over whether Archaeopteryx was a true bird, or a paravian dinosaur, or some other kind of dino.

Evolution is complicated, and thus, there often are multiple overlapping reasons that particular traits are adaptive. One such evolutionary puzzle is the reason that birds have beaks instead of teeth.

The first 3D reconstructions of extinct Cretaceous birds reveal a reptilian tooth replacement pattern. The birds flapping around in the Age of Dinosaurs had all sorts of different teeth in their ...