{"id":697918,"date":"2025-11-02T18:15:13","date_gmt":"2025-11-02T15:15:13","guid":{"rendered":"https:\/\/buradabiliyorum.com\/en\/young-t-rex-or-a-new-dinosaur-new-bones-add-to-the-debate\/"},"modified":"2025-11-02T18:15:13","modified_gmt":"2025-11-02T15:15:13","slug":"young-t-rex-or-a-new-dinosaur-new-bones-add-to-the-debate","status":"publish","type":"post","link":"https:\/\/buradabiliyorum.com\/en\/young-t-rex-or-a-new-dinosaur-new-bones-add-to-the-debate\/","title":{"rendered":"Young T. rex or a new dinosaur? New bones add to the debate"},"content":{"rendered":"
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\n This image provided by North Carolina State University shows Associate Research Professor Lindsay Zanno posing with one of her dinosaur finds at the North Carolina Museum of Natural Science<\/a>s in downtown Raleigh, N.C. March 25, 2024. Credit: Marc Hall\/North Carolina State University via AP
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Scientists have long puzzled over the origins of a mysterious dinosaur excavated in the 1940s: Was it a young T. rex or another type of dinosaur?<\/p>\n

At first, researchers had only a tyrannosaur skull to go by, making it hard to tell if it belonged to a child or adult. Another skull and skeleton nicknamed Jane added to the debate, but didn’t settle the controversy.<\/p>\n

Now a research team said there’s new evidence that resolves the case. The latest clue comes from a complete skeleton\u2014first uncovered in 2006 in Montana\u2014that scientists say identifies the mystery reptile as its own species and not a juvenile Tyrannosaurus rex.<\/p>\n

The discovery “rewrites decades of research on Earth’s most famous predator,” said study co-author Lindsay Zanno with the North Carolina Museum of Natural Sciences and North Carolina State University.<\/p>\n

Growth rings within the bones found in Montana’s Hell Creek Formation told scientists the new dinosaur was an adult about half the size of a fully-fledged T. rex. From growth comparisons to other reptiles like crocodiles, they also found that the major differences between the creature’s skull and an adult T. rex’s\u2014changes in bone structure, nerve patterns and sinuses\u2014were unlikely to form from simply going through puberty.<\/p>\n

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\n This image provided by the North Carolina Museum of Natural Sciences shows the skull of a tyrannosaur that may be a new species. Credit: North Carolina Museum of Natural Sciences via AP
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Signs pointed to a dinosaur that’s a distant T. rex cousin known as Nanotyrannus lancensis, the researchers reported in a study published<\/a> Thursday in the journal Nature<\/i>.<\/p>\n

There’s now “more support and evidence than there ever has been” that this T. rex relative could exist, said Holly Woodward, a fossil bone expert from Oklahoma State University who had no role in the new study. But she’s not yet convinced that the other mystery skeletons like Jane are something new.<\/p>\n

Other independent scientists also said the debate isn’t over. The new skeleton is indeed an adult, but it could be a sister species to T. rex and not a distant relative, said vertebrate paleontologist Thomas Carr of Carthage College.<\/p>\n

There are similarities between the shape of T. rex’s skull and the mystery specimens that keep him from switching camps.<\/p>\n

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\n This illustration provided by Friends of the North Carolina State Museum of Natural Sciences shows a possible new group of small tyrannosaurs attacking a young T. rex. Credit: Anthony Hutchings, Friends of the North Carolina State Museum of Natural Sciences via AP
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“I don’t think this study settles everything,” he said.<\/p>\n

Resolving this case of mistaken identity is important to understanding how T. rex grew up, said study co-author James Napoli with Stony Brook University. Another big question is whether T. rex was the main predator prowling toward the end of the age of dinosaurs 67 million years ago\u2014or whether a tinier, but still mighty predator also roamed.<\/p>\n

The new skeleton is dubbed “Dueling Dinosaurs” because it was found intertwined with the bones of a Triceratops, and is currently on display at the North Carolina Museum of Natural Sciences.<\/p>\n

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More information:<\/strong>
\n\t\t\t\t\t\t\t\t\t\t\t\tNanotyrannus and Tyrannosaurus coexisted at the close of the Cretaceous, Nature<\/i> (2025). DOI: 10.1038\/s41586-025-09801-6<\/a><\/p>\n<\/p><\/div>\n

\n\t\t\t\t\t\t\t\t\t\t\t\t \u00a9 2025 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed without permission.\n\t\t\t\t\t\t\t\t\t\t\t <\/p>\n

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\n\t\t\t\t\t\t\t\t\t\t\t\tCitation<\/strong>:
\n\t\t\t\t\t\t\t\t\t\t\t\tYoung T. rex or a new dinosaur? New bones add to the debate (2025, November 2)
\n\t\t\t\t\t\t\t\t\t\t\t\tretrieved 2 November 2025
\n\t\t\t\t\t\t\t\t\t\t\t\tfrom https:\/\/phys.org\/news<\/a>\/2025-10-young-rex-dinosaur-bones-debate.html\n\t\t\t\t\t\t\t\t\t\t\t <\/p>\n

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