The discovery, published in The Anatomical Record, underscores how air sacs facilitated rapid size increases among dinosaurs. Fresia Ricardi-Branco, the project's principal investigator ...

And it’s this anatomy that enabled prosauropods to evolve into the largest dinosaurs of all time. So, let’s take a closer look. Specialized lungs and air sacs allowed them to take in more oxygen.

They pointed out that Spinosaurus, like many other dinosaurs, had air sacs in the bones of their spine, providing so much buoyancy that diving would have been impossible. “Therefore, the density ...