Was the Dumbest Dinosaur?

Because of this incredibly disproportionate brain to body ratio, Stegosaurus has historically been known as the dumbest dinosaur, a fact that was seemingly backed up by a proposed “second brain” located around the animal's hip.

What was the least intelligent dinosaur?

The Least Intelligent Dinosaurs:

The primitive dinosaurs belonging to the group sauropodomorpha (which included Massospondylus, Riojasaurus, and others) were among the least intelligent of the dinosaurs, with an EQ of about 0.05 (Hopson, 1980).

Did dinosaurs have 2 Hearts?

There's no evidence that dinosaurs of any sort had bizarre accessory hearts, but the idea has still played a small role in the ongoing investigation into how giant dinosaurs actually lived. To start, we have to go back to ancient bones and the ways in which paleontologists put them together.