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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?
Dinosaur was built for head-butting
How would our evolution be affected if our brains were located at
Fossil & Mineral Articles
Do you know why some dinosaurs had a second brain in their tail? - Quora
Did Dinosaurs Have Two Brains? — JPT
The Double Dinosaur Brain Myth, Science
The myth of nature's second brain, exposed - Vox
Did Dinosaurs Have Two Brains? — JPT
Dinosaur was built for head-butting