The reason you’ll want to keep the bird upright is because birds have air sacs on the sides of their bodies. Similarly to lungs, these air sacs inflate and deflate to breathe, and presumably can ...

Pterosaurs and some dinosaurs also have hollow bones, though it’s not entirely clear that these features allowed space for air sacs. One study published in 2022 found that some of the oldest known ...

Air sacs, also found in modern birds, helped sauropods take in more oxygen and keep their bodies cool. These features were vital for surviving in tough environments and growing to extreme sizes.

Air sacs, also found in modern birds, helped sauropods take in more oxygen and keep their bodies cool. These features were vital for surviving in tough environments and growing to extreme sizes.