T rex arms why

Thanks for contacting us. We've received your submission. Running into a Tyrannosaurus rex in the wild would have been a truly frightening thing for just about any animal that roamed the Earth between 65 million and 80 million years ago, and for an obvious reason.

The mighty meat-eater was huge and had a mouth built to turn bones into powder. If it snagged you with its jaws, you were probably going to have a bad time, but nobody was afraid of its puny little arms … or were they? We often joke about Tyrannosaurus arms. Kieran explains more about small-limbed dinosaurs. Dinosaurs Prehistoric Video What on Earth? Discover dinosaurs Find out what Museum scientists are revealing about how dinosaurs looked, lived and behaved. Dig up dino facts.

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The team will help uncover dinosaur fossils and footprints in Wyoming. What's the next best thing to studying prehistoric dinosaurs in the flesh? Not everything you've been led to believe about dinosaurs is true.

Don't miss a thing. First name. To investigate, then, the researchers looked at the ulna and humerus in the alligator and turkey with a technique called X-ray Reconstruction of Moving Morphology, or XROMM. First, the investigators attached each wing and arm to a plexiglass platform between two devices that generated X-ray movies. Then, the researchers used fishing wire to tug on the elbow of each specimen, causing the wing and arm to fold up, the researchers said. Finally, "we used the two X-ray views of each elbow to reconstruct how the bones moved in three dimensions by precisely matching virtual models of each bone to the movies," the researchers said.

The results showed just how complex turkey and alligator elbows are. In humans, "when we flex our elbows, both forearm bones follow the hinge joint to fold in toward the upper arm," the researchers said. On the other hand so to speak , in alligators and turkeys, "the elbow joint is more complex, and both bones in the forearm not only pivot around the joint, but [also] rock sideways toward the upper arm bone as the elbow is flexed," the researchers said. Once again, Mother Nature has solved the same problem in different ways.

Matthew Inabinett, a graduate student of paleontology at East Tennessee State University, who wasn't involved with the research, agreed.