Flying is really hard work. Compared to walking, swimming, or running, flying is the form of movement that takes the most energy and requires the most calories. That means that birds have had to ...

One of Earth’s first birds had modern bird-like mouth features that evolved to handle food efficiently and meet the energy ...

Evolutionary biologists at Johns Hopkins Medicine report they have combined PET scans of modern pigeons along with studies of dinosaur fossils to help answer an enduring question in biology: How did ...

The digestive systems of mammals exemplify a remarkable spectrum of adaptations that have evolved in tandem with dietary specialisations. These adaptations encompass both morphological ...