Why Did the T. Rex Have Such Tiny Arms?
With a name that literally means tyrant Lizard King You'd assume that tyrannosaurus rex would get a bit more respect, but the giant predators disproportionately small arms have been the subject of ridicule for decades there are also a scientific puzzle more than one hundred years after discovery of this species, experts still don't know why huge animal one that could reach lengths of forty feet, or twelve meters, or more had four limbs. That were much longer. Longer than an adult humans, if the arms were limp muscle free pegues, it'd be easy to assume that they serve no purpose. However, the evidence hints at a more complicated story, a few studies have argued that judge by the muscle scars left behind on T. rex limb bones, a full grown dinosaur could curl more than two hundred and twenty pounds or one hundred kilograms with each one of their biceps then again. This isn't as impressive as it sounds. Thomas R Holtz of vertebrate paleontologist at the University of Maryland tells us that some people like to overrate Tirana sources upper body strength that figure from before only translates to about one point. Two five percent of the dinosaurs total body weight, which may have been in the ballpark of around eight tons or eight thousand kilograms. Holt says that's like a two hundred pound or ninety kilogram man proud. Proud of the ability to curl two point, five pounds or one kilogram on these grounds, a few experts have concluded that tyrannosaurus arms were either functionless or seldom used, but not all paleontologists by this idea for his money. Kenneth Carpenter of UTAH. State University thinks the little limbs made great hunting tools in two thousand, eight, he and fellow paleontologist Christine. Lipkin impaired the five to source rex wishbones. For years that were known to science at the time shaped like a giant boomerang. Sits between the shoulder blades, three of the five wishbones that carpenter and Lipkin studied show, telltale signs of injury, among these were stress fractures, which must have re healed in life. So, what does this mean well? According to carpenter? The fore limbs were subjected to a great deal of repetitive stress, which was not uniform or steady, instead there were moments of extraordinarily great force applied to the arms. The likely explanation is that t rex used its fore limbs to grab hold of large struggling prey, a plus sized thrashing victim could easily fracture the carnivores, wishbone, or at least tear a few arm. Arm Muscles loose other ideas about the purpose of T.. REX arms have nothing to do with subduing victims. One School of thought involves naptime perhaps after a good night's sleep. Taran disorders use those arms to push itself up off the ground, or maybe they had a sexier function. Henry Fairfield Osborn the paleontologist who named the species back in nineteen o five believed that males used their four limbs to grab hold of their mates as Holtz and others have admitted. There simply isn't enough evidence at this time to conclusively refute or verify any of these notions, such is often the nature of paleontology.