A shared shape rule, the power cascade, governs most bird beak growth. It links modern birds with extinct dinosaurs.

While rare, a few birds we studied were rule-breakers. One such rule-breaker is the Eurasian spoonbill, whose highly ...

We have found, however, that this incredible diversity is underpinned by a hidden mathematical rule that governs the growth ...

It is endowed with birds that have beautiful covers of feathers on their bodies and perform unmissable courtship dances. But the vibrant and colourful beaks are one among those features that often ...

Bird beaks come in almost every shape and size—from the straw-like beak of a hummingbird to the slicing, knife-like beak of an eagle. We have found, however, that this incredible diversity is ...