Scientists already knew that birds evolved from dinosaurs. But thanks to a Yale-led study published Wednesday in the journal Nature, they know what the first bird beak looked like during that ...

The early bird catches the rule. To investigate the power cascade rule of growth, we researched 127 species of theropods. We found that 95% of theropod beaks and snouts follow this rule.

Scientists have pieced together what they think is the first bird beak ever to have evolved. It belongs to Ichthyornis dispar, which lived in North America nearly 100 million years ago. It's ...

In 1867, biologist Thomas Henry Huxley proposed that birds with fused upper beaks had maintained this trait from ancient ancestors, and that jointed upper beaks – which allow the top beak to ...