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A large, hollow cavity in the rear end of some dinosaurs has been postulated to contain a second brain. But, is this just a myth?
Strange Science: Dinosaurs and Dragons
Eons, Stegosaurs: Tiny Brains & Thagomizers, Season 1, Episode 4
Fossil & Mineral Articles
What is the new fact that can be seen from the fossil of the dinosaur 'butt hole' discovered for the first time in the world? - GIGAZINE
Fossil scars capture dinosaur headbutts
Did the Stegosaurus have a second brain in its hips? If so, what was it for? - Quora
Fossil Porn — Therizinosaurus has the largest hand claws in the
Fossil Porn
Fossil Porn — mosasaurus-rex: A jaw section of the Mosasaur
Did dinosaurs have two brains? If so, how did they discover that? - Quora
10 Shocking Facts About The Stegosaurus - The Fact Site