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https://www.cbsnews.com/news/dinosaur-mystery-t-rex-rival-species-researchers-say/https://www.abc.net.au/news/science/2025-10-31/new-research-t-rex-nanotyrannus-debate-duelling-dinosaur/105946658https://www.sciencealert.com/decades-of-t-rex-research-flipped-teacup-tyrant-confirmed-as-separate-species
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Highlights
  • Analyses of the Montana find confirm Nanotyrannus lancensis as a brand-new species, not a juvenile Tyrannosaurus rex.
  • Growth rings in the bones suggest the new dinosaur was an adult about half the size of a fully grown T. rex.
  • The complete skeleton is nicknamed part of a 'Dueling Dinosaurs' find, intertwined with a Triceratops in Hell Creek.

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References

Mysterious dinosaur skeleton thought to be a teenage T. rex is actually a rival species, researchers say

https://www.cbsnews.com/news/dinosaur-mystery-t-rex-rival-species-researchers-say/Cbsnews.com
Mysterious dinosaur skeleton thought to be a teenage T. rex is actually a rival species, researchers say

Bloody Mary fossil 'flips decades of T. rex research on its head'

https://www.abc.net.au/news/science/2025-10-31/new-research-t-rex-nanotyrannus-debate-duelling-dinosaur/105946658Abc.net.au
Bloody Mary fossil 'flips decades of T. rex research on its head'

Decades of T. Rex Research Flipped: 'Teacup Tyrant' Confirmed as Separate Species

https://www.sciencealert.com/decades-of-t-rex-research-flipped-teacup-tyrant-confirmed-as-separate-speciesSciencealert.com
Decades of T. Rex Research Flipped: 'Teacup Tyrant' Confirmed as Separate Species

NC museum's work yields new dino discovery

https://www.wral.com/news/local/nanotyrannus-lethaeus-trex-nc-museum-oct-2025/Wral.com
NC museum's work yields new dino discovery

This tiny T. rex is actually a new species

https://www.popsci.com/science/tiny-t-rex-new-species/Popsci.com
This tiny T. rex is actually a new species

Researchers discover new tyrannosaur species in ‘duelling dinosaurs’ fossil

https://www.theguardian.com/science/2025/oct/30/researchers-discover-nanotyrannus-tyrannosaur-species-in-duelling-dinosaurs-fossilTheguardian.com
Researchers discover new tyrannosaur species in ‘duelling dinosaurs’ fossil

‘Duelling dinosaurs’ fossil reveals T rex had a pygmy cousin

https://www.thetimes.com/uk/science/article/dinosaur-t-rex-fossil-nanotyrannus-p2trz7ckdThetimes.com
‘Duelling dinosaurs’ fossil reveals T rex had a pygmy cousin

Stein announces groundbreaking dinosaur discovery

https://www.yahoo.com/news/articles/major-dinosaur-discovery-made-north-184326073.htmlYahoo.com
Stein announces groundbreaking dinosaur discovery

Young T. rex or a new dinosaur? New bones add to the debate

https://apnews.com/article/nanotyrannus-t-rex-dinosaurs-d829b87000a99e803bca9cde5f1dbffbApnews.com
Young T. rex or a new dinosaur? New bones add to the debate

Meet Wee Rex! T.Rex's cousin was HALF its size - but just as feisty

https://www.dailymail.co.uk/sciencetech/article-15245347/Scientists-discover-remains-T-Rexs-pygmy-cousin.htmlDailymail.co.uk
Meet Wee Rex! T.Rex's cousin was HALF its size - but just as feisty

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