Skull sinuses precluded extinct crocodile relatives from cetacean-style deep diving as they transitioned from land to sea
During major evolutionary transitions, groups develop radically new body plans and radiate into new habitats.A classic example is cetaceans which evolved from terrestrial ancestors to become pelagic swimmers.In doing so, they altered their air-filled sinuses, transitioning some of these spaces to allow for fluctuations in air capacity and storage v