![]() In the latest paper, a different statistical technique was used to determine how many clusters exist within the data without any advanced assumptions, finding that they are best considered as a single group-in other words, one species- T. ![]() Because the statistical analysis in the original study defined the number of groups before the test was run, it is not useful for testing the hypothesis, according to the new study’s authors. Additionally, the scientists on the new study took issue with how the “breakpoints” for each species using these traits were statistically determined. However, the authors of the new study could not replicate the tooth findings, and they recovered different results from their own measurements of the same specimens. Variation in the size of the second tooth in the lower jaw, in addition to robustness of the femur, indicated the presence of multiple species according to the original paper. That’s a clear warning sign of a hypothesis that doesn’t map onto the real world.” In practical terms, the three-species model is so poorly defined that many excellent specimens can’t be identified. “Our study shows that rigorous statistical analyses that are grounded in our knowledge of living animals is the best way to clarify the boundaries of extinct species. “Pinning down variation in long-extinct animals is a major challenge for paleontologists,” said co-lead author Thomas Carr from Carthage College. “ Tyrannosaurus rex remains the one true king of the dinosaurs.” - Steve Brusatte rex stands alone as the single giant apex predator from the end of the Age of Dinosaurs in North America.” Based on all the fossil evidence we currently have, T. It is true that the fossils we have are somewhat variable in size and shape, but as we show in our new study, that variation is minor and cannot be used to neatly separate the fossils into easily defined clusters. “Recently, a bold theory was announced to much fanfare: what we call T. “ Tyrannosaurus rex remains the one true king of the dinosaurs,” said study co-author Steve Brusatte, a paleontologist at the University of Edinburgh who conducted his Ph.D. ![]() ![]() The study is published today (July 25, 2022) in the journal Evolutionary Biology and led by paleontologists at the American Museum of Natural History (AMNH) and Carthage College. The rebuttal finds that the earlier proposal lacks sufficient evidence to split up the iconic species. Paleontologists find insufficient evidence that the iconic Tyrannosaurus rex should be reclassified.Ī bold assertion made earlier this year that fossils identified as belonging to the dinosaur Tyrannosaurus rex really represent three distinct species is debunked by new research. rex with patches of feathers-the most scientifically accurate representation of T. rex: The Ultimate Predator, which was on view from 2019-2021, visitors encountered a massive life-sized model of T. As part of the Museum’s temporary exhibition T. ![]()
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