Surmising even the physical appearance of a dinosaur - or any extinct animal - based on its fossils is a tricky proposition, with so many uncertainties involved. Assessing a dinosaur's intelligence, considering the innumerable factors contributing to that trait,

Herculano-Houzel proposed that dinosaurs like T. rex had an exceptionally high number of neurons –over 3 billion of them, or more than a baboon. This higher number of neurons could mean that they were more intelligent than assumed.

How intelligent was Tyrannosaurus rex? Paleontologists and other researchers have long been intrigued by this question—and it’s a difficult one to answer. While scientists have plenty of fossilized bones to study,

Not too long ago, Brazilian neuroscientist Suzana Herculano-Houzel published a controversial study that boldly claimed that T. rex had an intellect rivaling modern baboons. The assumption was that Tyrannosaurus rex was very smart and might have even used tools (with those tiny hands?

New study finds T. rex had a simpler brain, more like crocodiles than primates, debunking older theories on intelligent traits.