TEAM of researchers reports on Friday that huge tooth marks on Tyrannosaurus Rex bones indicate the ancient giant dinosaurs may have cannibalised one another.
“They’re the kind of marks that any big carnivore could have made, but T. Rex was the only big carnivore in western North America 65 million years ago,” Nicholas R. Longrich of Yale University said in a statement.
Longrich and colleagues report their findings in Friday’s edition of the journal PLoS ONE. They found 17 fossils with deep V-shaped gouges of a type identified as being made by T. Rex. Of those, four were remains of T. Rex themselves. It seems likely the marks were made during scavenging from a dead dinosaur, the res-earchers said. “It does seem improbable that Tyrannosaurus routinely hunted full-grown members of its own species,” the resea-rchers wrote. However, they added, it is possible that combat led to casualties, with the dead becoming convenient sources of food for the victors. “Still, compelling evidence for predation in Tyrannosaurus remains elusive.” Longrich and colleagues note that “cannibalism is common in nature, particularly among large carnivores”. —AP