Saturday, October 23, 2010

What Did Tyrannosaurus Rex Eat? Each Other

It turns out that the acknowledged baron of the dinosaurs, Tyrannosaurus rex, didn't aloof eat added dinosaurs but additionally anniversary other. Paleontologists from the United States and Canada accept begin chaw marks on the giants' basic that were fabricated by added T. rex, according to a fresh abstraction arise online Oct. 15 in the account PLoS ONE.

While analytic through anachronistic deposit collections for addition abstraction on anachronistic basic with mammal tooth marks, Yale researcher Nick Longrich apparent a cartilage with abnormally ample gouges in them. Given the age and area of the fossil, the marks had to be fabricated by T. rex, Longrich said. "They're the affectionate of marks that any big carnivore could accept made, but T. rex was the alone big carnivore in western North America 65 actor years ago."

It was alone afterwards advertent the chaw marks were from a T. rex that Longrich accomplished the cartilage itself additionally belonged to the behemoth. Afterwards analytic through a few dozen T. rex basic from several altered building deposit collections, he apparent a absolute of three bottom basic (including two toes) and one arm cartilage that showed affirmation of T. rex cannibalism, apery a cogent percentage.

"It's hasty how common it appears to accept been," Longrich said. "We're not absolutely abiding what that means."

The marks are absolutely the aftereffect of feeding, although scientists aren't abiding whether they are the aftereffect of scavengers or the end aftereffect of fighting, Longrich said, abacus that if two T. rex fought to the death, the champ ability accept fabricated a meal out of his adversary. "Modern big carnivores do this all the time," he said. "It's a acceptable way to booty out the antagonism and get a bit of aliment at the aforementioned time."

However, the marks arise to accept been fabricated some time afterwards death, Longrich said, acceptation that if one anachronistic dead another, it ability accept eaten best of the meat off the added attainable genitalia of the body afore abiding to aces at the abate bottom and arm bones.

No comments:

Post a Comment