How Pterosaurs Filled Their Lungs

Imagine a balloon inside a cask. There’s an opening at the top to blow air into, but here’s the problem – the balloon hugs the wooden walls of the chamber. There’s nowhere for the balloon to expand into and no way for old air to be pressed out. The sides of the barrel won’t move. […]

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Bird-like lungs powered giant pterosaur flight

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Pterosaur - Wikipedia

How Pterosaurs Filled Their Lungs

During the Cretaceous, birds remained small. Do we know why