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Tyrannosaurus Rex was 50 feet long, stood 30 feet tall and weighed 21 tons. It lived from 70-65 million years ago, so it lived on earth for 5 million years. And, it had proportionately the longest legs of any animal that ever lived in proportion to its body size. Its thigh bones were both each 5 feet long and its shine bones were both each 4 feet long, making its legs both each 9 feet long. Now, most fast running bipeds have shine bones that are longer than their thigh bones, like the ostrich, that's what makes them fast runners. Our thigh bones and shines bones are both each about the same length, so we're kind of half fast and half slow, or basically, we're kind of not too fast and not too slow. But T.Rex's thigh bones were longer than it's shine bones, which means, it was either a slow runner or just a walker, of course, that's what paleontologist Jack Horner thinks, he thinks that T.Rex was just a scavenger, but his theory makes no sense. But most people like me think that T.Rex was both a predator and a scavenger, how about you? That theory makes more sense, in fact it makes the most sense. Because there are no 100% predators and there are no 100% scavengers, every single carnivore that has ever lived on this planet are all each 50% predator and 50% scavenger. For example, lions are predators, but they'll sometimes scavenge and hyenas are scavengers, but they'll sometimes hunt. T.Rex could have been more of an ambush predator. It would likely either target the young, old, sick, weak or injured, or use stealth like a big cat would in order to catch its prey. But despite the disproportional legs, most people like me think that T.Rex was actually pretty fast. It was once thought that T.Rex could run up to 60 mph. But then they figured that in order to run that fast, T.Rex would have needed 90% of its muscle mass concentrated in its legs, physically impossible. It's now been estimated that T.Rex only ran 32 mph. But the juvenile T.Rexes were built differently from the adults, they were built more like ostriches, because their legs were built more like an ostrich's legs. It's been estimated that the juvenile T.Rexes could run up to 50 mph, while the adults could only run 32 mph, so the juveniles were faster than the adults. It's also been discovered that T.Rex actually hunted in packs, so they could have hunted just like lions do, because female lions are faster than the males. Female lions chase down the prey, while the males ambush them, so the females are more of predators and the males are more of scavengers. So, the juvenile T.Rexes could have chased down the prey, while the adults ambushed them, so juvenile T.Rexes could have been more of predators and the adults could have been more of scavengers. The youngest T.Rex ever found was The Wankel Rex, it was 65 million years old, which means, it lived and died 65 million years ago. And, the oldest T.Rex ever found was G.Rex, it was 70 million years old, which means, it lived and died 70 million years ago, 5 million years older than The Wankel Rex. With these two specimens, paleontologists and scientists were able to study, examine and compare T.Rexes that lived 5 million years apart and see just how T.Rex evolved over time. They've confirmed that when T.Rex first evolved 70 million years ago, it had relatively long shine bones compared to the thigh bones, just like an ostrich, which would have made it a fast runner. But then, 5 million years later, when T.Rex became extinct along with all of the other dinosaurs 65 million years ago, its leg proportions changed. It's thigh bones got longer and it's shine bones got shorter, which means, it also got slower, until it was the exact opposite, the thigh bones were then longer than the shine bones, which would have made T.Rex either a slow runner or just a walker. So, when T.Rex first evolved 70 million years ago, it could have been more of a predator then and then when it went extinct along with all of the other dinosaurs 65 million years ago, it could have evolved into more of a scavenger then as it continued to evolve over the past 5 million years. G.Rex and The Wankel Rex were both found on the hell creek formation and the age of a fossil is calculated by the depth of its location in the ground. The Wankel Rex was found at the top of the hell creek formation. And on the hell creek formation, there's 100 feet for every 1 million years, so the further down you go, the further back in time you go. So, because G.Rex was 5 million years older than The Wankel Rex, that means it was found 500 feet lower than where The Wankel Rex was found.

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Please put the parents up...to verify. If true it is worrying. What is the bases of the on going. Facts please.

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