That meal may have been its last, though, because it was soon gobbled up by an even bigger sea monster. In the early Cretaceous, large swathes of the continent's interior were covered by the Eromanga Sea. Analysis of the creature's fossilized stomach contents, including the two pterosaur bones (c and d). "The only predator known from the Eromanga Sea capable of producing injuries of this magnitude is the giant pliosaur Kronosaurus queenslandicus," says White. Recently, fossil footprints found in South Korea captured a giant pterosaur apparently hunting a small animal on land.