Troodon is believed to be the smartest dinosaur ever, with an EQ of 5.8. This small coelurosaurian dinosaur (similar evolutionary group to modern birds) had a huge brain, especially considering its size, making it the smartest among dinosaurs.
The largest tyrannosaurs like T. rex had an EQ in the range of 2.0 to 2.4. By comparison, our EQ is about 7.5, dolphins come in around 4.0 to 4.5, chimps at about 2.2 to 2.5, dogs and cats are in the 1.0 to 1.2 range, and mice and rats languish around 0.5.
Velociraptor was probably a pack hunter, which would have allowed it to attack prey much larger than itself. It also had a very large brain relative to its size - it was one of the smartest dinosaurs. It was very light and very fast, believed to be capable of sprinting at speeds of 40 miles per hour.
The Spinosaurus was heavier, taller, and longer than the T-Rex, but the latter's bite was far more powerful. The Spinosaurus was also believed to be semi-aquatic, but the T-Rex lived solely on land. Lastly, the T-Rex was far more intelligent than the Spinosaurus and had more acute senses.
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.
The Giganotosaurus was as tall as a T-Rex at 20 feet high, but it was also heavier, longer, and faster. Aside from their physical build, the most significant difference between them is their intelligence. The T-Rex was smarter than a Giganotosaurus and had more finely tuned senses.
Did you know that the Velociraptor has an I.Q. of 0.20 wh...
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).
85 to 114: Average intelligence. 115 to 129: Above average or bright. 130 to 144: Moderately gifted. 145 to 159: Highly gifted.
Consisting of two hemispheres, this chunk of neural anatomy is responsible for the animal's cognition (amongst other stuff). Herculano-Houzel estimated that T. rex had roughly 3 billion cerebral neurons packed into its 343-gram (12-ounce) brain; more than the number found in baboons.
Bottlenose Dolphins
For years, dolphins have been heralded as the smartest animals on Earth, second only to humans—though some would even contest that ranking. Aside from humans, dolphins have the greatest brain-to-body ratio among animal species, including primates.
Bizarre 500-toothed dinosaur
Nigersaurus, you might remember, we named for bones collected on the last expedition here three years ago. This sauropod (long-necked dinosaur) has an unusual skull containing as many as 500 slender teeth.
By calculating the ratio of brain size to body size as a measure of intelligence (modern day animal scientists use this ratio as an approximation), we can infer that the T. rex about matches a chimp on smarts, and was quite a bit keener than a pet cat or dog.
The smartest ones are usually thought to be the troodons, bird-like dinosaurs from the late Cretaceous period. They fit many of the requirements we usually look for in a technologically advanced species. Not only were they intelligent (based on the size of their brains), but they were very social.
However, the lowest IQ score possible is zero. Can someone actually get this low of a score? In theory, yes. But no one in recorded history has officially scored zero on an IQ test, even if that result is theoretically attainable.
Classification of IQ scores
Those with a 145-154 score would be considered geniuses at the collegiate level. A person with a 155-164 IQ score is on par with Nobel Prize winners. High genius is defined as a score between 165 and 179, while the ultimate genius has a score between 180 and 200.
Troodontids (formerly Saurornithoidids) were remarkable in having the largest brain-to-body size ratio of all non-avian dinosaurs, possibly making them the most intelligent dinosaurs on a level with the smartest birds.
Therizinosaurus And T-Rex Kill Giganotosaurus | Jurassic World: Dominion [4K]
With its immense power, intellect, defenses, and speed, the Indominus rex would kill the T-rex.
Of course, the Tyrannosaurus Rex had the strength to be called “the strongest dinosaur”. Rex, a Latin word meaning “King”, reflects the kingly status it achieved due to its imposing characteristics.