New York. The Tyrannosaurus rex is often shown baring massive, sharp teeth, like the ferocious creature in “Jurassic Park.” But new research suggests that this classic image might be wrong.
The teeth on T. rex and other big theropods were likely covered by scaly lips, concludes a study published Thursday in the journal Science. The dinosaur’s teeth didn’t stick out when its mouth was closed, and even in a wide open bite, you might just see the tips, the scientists found.
The research is the latest in a long back-and-forth over how dinosaur mouths really looked.
Recent depictions show big teeth jutting out of the dinosaurs’ jaws, even when closed. Some thought the predators’ teeth were just too big to fit in their mouths, said study author Thomas Cullen, a paleontologist at Auburn University in Alabama.
When researchers compared skulls from dinosaurs and living reptiles, though, they found this wasn’t the case. Some large monitor lizards actually have bigger teeth than T. rex compared to their skull size, and can still fit them under a set of scaly lips, Cullen said.
The scientists also found clues in the pattern of wear and tear on tooth surfaces.
For a creature like a crocodile, whose teeth stick out of its mouth, the exposed part gets worn down quickly — “like someone’s taken a sander to the side of the tooth,” said another study author Mark Witton, a paleoartist at England’s University of Portsmouth. (AP)
Gary P Hernal started college at UP Diliman and received his BA in Economics from San Sebastian College, Manila, and Masters in Information Systems Management from Keller Graduate School of Management of DeVry University in Oak Brook, IL. He has 25 years of copy editing and management experience at Thomson West, a subsidiary of Thomson Reuters.
