Last month science illustrator Eleanor Lutz brought us stunning graphics showing how animals fly. And now she’s at it again with amazing illustrations showing how different animals breathe. The ...

An air-filled sac within the birds' lungs is believed to increase the force the birds use to power flight muscles while soaring. Soaring birds -- like osprey, eagles, falcons, even vultures -- can ...

(CN) — In a new study, researchers say soaring birds like eagles, vultures and falcons that can glide effortlessly by flapping their wings only occasionally have evolved to use their lungs to aid in ...

Like birds, green iguanas have unidirectional airflow in their lungs: When they breathe in or out, air flows in a one-way loop. “For years, people thought that the design evolved to meet the energetic ...

Birds are profoundly important animals. As predators, pollinators, seed dispersers, scavengers and ecosystem bioengineers, the world's 11,000 species of birds play critical roles in the food chain and ...

Biologists long assumed that one-way air flow was a special adaptation in birds driven by the intense energy demands of flight. But now scientists have shown that bird-like breathing also developed in ...