ALBUQUERQUE — Fossilized lungs found preserved along with an ancient bird may breathe new life into studies of early avian respiration. If confirmed as lungs, the find marks the first time that ...

Dinosaurs are far from 'extinct', but dominate as birds still most regions of the globe. Part of this huge success is due to the evolution of air sacs, which are crucial for the high efficiency of ...

Dinosaurs may have been fierce predators but they had a respiratory system similar to modern birds such as the sparrow, scientists said on Wednesday. Ancient beasts such as the mighty Tyrannosaurus ...

An avian disease that is spreading and killing tons of birds is more frequently making the jump to mammals, which has health experts appropriately concerned. So far, the risk to humans of so-called ...