New research suggests T. rex may have been less intelligent than previously believed, more akin to 'reptile smart' than primate level.

The study challenges earlier comparisons of T. rex intelligence to that of baboons, refuting the basis of those claims.

Researchers argue previous intelligence estimates were flawed, overestimating brain tissue in T. rex skulls, which likely contained more cerebrospinal fluid.

The ongoing debate about T. rex intelligence is tied to its iconic status and public fascination with the species.

The study emphasizes the importance of using comprehensive methods to assess the intelligence of extinct creatures, beyond just neuron counts.