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Palaeontology

Young T. rex is '1-in-100-million' discovery

By T.K. Randall
March 31, 2018 · Comment icon 10 comments



(Pictured) A juvenile T. rex on display at Carnegie Museum. Image Credit: CC BY-SA 3.0 Sage Ross
Palaeontologists have unearthed the well-preserved remains of a juvenile Tyrannosaurus rex in Montana.
Found within the state's famous Hell Creek formation, the young dinosaur is one of only a small handful of 'decently complete' juvenile T. rex fossils discovered at the site over the last 100 years.

One particularly impressive trait of these young carnivores was how fast they grew up.

"We would suspect [this T.rex would have been] maybe 6 to 7 years old, possibly 8," said Kyle Atkins-Weltman of the Biodiversity Institute and Natural History Museum at Kansas University.
Incredibly, the juveniles would have gained up to 3lbs every day at the peak of their growth.

"By the time they were 4 years old, they were the size of some of the largest land predators that are around today," said Atkins-Weltman. "It's literally hard to fathom an animal growing this fast because there's really nothing quite like it in the modern world."

Tyrannosaurus rex lived from around 67 to 65 million years ago before being wiped out alongside the rest of the dinosaurs by the mass extinction event at the end of the Cretaceous.



Source: Live Science | Comments (10)


Recent comments on this story
Comment icon #1 Posted by Herr Falukorv 5 years ago
Incredibly, the juveniles would have gained up to 3lbs every day at the peak of their growthThat sounds like me when I have vacation around christmas
Comment icon #2 Posted by AustinHinton 5 years ago
So, can we finally decide what Nanotyrannus is now? (Or did we, I’m kinda behind in the world of Dino news) 
Comment icon #3 Posted by oldrover 5 years ago
I think it's considered a juvenile now. But I'm not sure either.  
Comment icon #4 Posted by Carnoferox 5 years ago
Most researchers consider individuals formerly assigned to Nanotyrannus to be juvenile T. rex, but a few still advocate for generic separation.
Comment icon #5 Posted by AustinHinton 5 years ago
Interesting, any particular reason why? 
Comment icon #6 Posted by Carnoferox 5 years ago
The majority contend that the characteristics used to distinguish Nanotyrannus are just due to individual variation and ontogenetic change.
Comment icon #7 Posted by AustinHinton 5 years ago
Ah ok! 
Comment icon #8 Posted by AustinHinton 5 years ago
*cough cough* Stygimoloch *cough cough* 
Comment icon #9 Posted by Grignr 5 years ago
I'm not sure if there've been further developments but there was a great TED talk some time back about misidentifying dino juveniles: https://www.ted.com/talks/jack_horner_shape_shifting_dinosaurs  
Comment icon #10 Posted by Grignr 5 years ago
Sorry, internet where I am is a bit weird, let me know if the link fails to display.


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