A recent research has revealed that the tiny arms of T-Rex, although looked quite unimpressive, were actually vicious weapons used for slashing its victims. Tyrannosaurus Rex (T-Rex) is believed to be one of the most fearsome dinosaurs ever lived on Earth. T-Rex was known for its big size and was a very dangerous predator. But one thing interesting about this terrifying dinosaur was its miniature arms which looked quite odd as well as funny. But the most important thing is that these pipsqueak arms proved to be one of the most lethal weapons of the deadly dinosaur.
Earlier studies suggested that T-Rex’s small upper limbs were either used to grasp struggling or injured prey, help resting dinosaurs push themselves up from the ground, or grip or hold their mates tightly during sexual intercourse.
But Steven Stanley, a paleontologist from the University of Hawaii at Manoa found out that T-Rex’s 1 meter long (3.3 feet) forelimbs might look pretty short as compared to its other body parts, but they were effectively used by them for ‘viciously slashing’ of cornered prey. He noted that its short, strong forelimbs and large claws would have permitted T-Rex, whether mounted on a victim’s back or grasping it with its jaws, to inflict four gashes a meter (three feet) or longer and several centimeters (more than an inch) deep within a few seconds. He also said that the mammoth beast definitely used its four-inch long claws to inflict deep wounds on its unfortunate prey and that to be repeated multiple times in rapid successions.
Dr. Stanley informed that T-Rex had very strong and robust mini arms which possessed an unusual quasi-ball-and-socket joint that helped in moving the limbs in different directions for effective slashing. Also, T-Rex’s limited number of claws would have helped the deadly creature exert up to 50 percent more pressure in clawing and slashing. Stanley informed that No longer being selected for, the arms were selected against: the expansion of the head deprived them of nutrition in a zero-sum game. Then, as the arms approached their final size, natural selection kicked in opportunistically and put them to good use for slashing at close quarters. He further said that other many other therapods were widely known for infliction of damage by slashing. So, it is not surprising that T-Rex would have used similar kind of techniques to kill its prey.