Tyrannosaurus rex was also adept at finding its prey thanks to a keen sense of smell. While scientists have known for a while that this dinosaur devoted large portions of its brain to processing smell, studies have recently revealed that T. This powerful snout also likely helped T. Not everything about Tyrannosaurus rex was fierce, however.
This dinosaur had unexpectedly puny arms, and the function of these little limbs is a source of debate among scientists. Others argue that T. And while they had strong thighs, these dinosaurs were not speedy. They could only walk briskly at up to 12 miles an hour —likely not fast enough to chase a speeding Jeep, as depicted in the movie Jurassic Park.
Using biomechanical models, scientists have theorized that if these heavy animals moved any faster, they would have shattered the bones in their feet. Tyrannosaurus rex had a life expectancy of about 28 years. In January , a study of the fossils of Nanotyrannus —a smaller tyrannosaur that was believed to have lived alongside T.
In spite of all its advantages, T. This cataclysm occurred when an asteroid or comet the size of a mountain slammed into Earth, wiping out Tyrannosaurus rex along with the rest of the non-avian dinosaurs and bringing a sudden end to the Cretaceous period.
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A preferred service provider for major OEMs, SabeRex offers a wide array of technology services with capabilities across the entire United States and beyond. Its two-fingered forearms were puny, making it unlikely that T. However, it's possible that T. The "king of dinosaurs" needed thick neck muscles to hold up its large skull and power its forceful bite. Neck and arms muscles compete for space in the shoulder, and it appears that the neck muscles edged out the arm muscles in T.
Moreover, long arms can be broken, are vulnerable to disease, and take energy to maintain, so having short arms may have been beneficial to the king in the long run, Habib's research shows. The real work of dispensing with its prey was left to the dinosaur's massive and thick skull. The dinosaur's bite could exert up to 12, pounds-force 57, Newtons , which is roughly equivalent to the force of a medium-size elephant sitting down. But not all of the dinosaur's teeth served the same function , according to a study in the Canadian Journal of Earth Sciences.
Specifically, the dinosaur's front teeth gripped and pulled; its side teeth tore flesh, and its back teeth diced chunks of meat and forced food into the throat. Importantly, T. The first tyrannosaurs, which were human- to horse-size, originated about million years ago during the mid-Jurassic.
Though lacking in stature, these little tyrannosaurs had advanced brains and advanced sensory perceptions, including hearing, a study detailed in the journal Proceedings of the National Academy of Sciences revealed. The finding, on a newfound mid-Cretaceous tyrannosaur named Timurlengia euotica , suggests that the advanced brains tyrannosaurs developed while they were still small helped them become apex predators once they grew to T.
The predator acquired its food through scavenging and hunting , grew incredibly fast and ate hundreds of pounds at a time, said University of Kansas paleontologist David Burnham.
They had to go out and kill for food when they were hungry.
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