But when compared to an elephant with a brain weighing up to 6,000g, the human being is just a lower animal. And whales are probably the smartest creatures on the planet when their brains weigh up to 7,800g.
Thus, that measure of intelligence the size of the brain is completely wrong. Since large animals need more cells and nerve connections to control their giant organs, they also need more nerve fibers to transmit the signals.
Instead of comparing brain size, psychologist Harry J. Jerison came up with a formula called Encephalization Quotien. This is a mathematical formula that evaluates the ratio of the brain to the animal’s body size, thereby calculating the intelligence of the animal.
Judging by this formula, we will see that humans are the most intelligent creatures, then primates like monkeys, followed by dolphins and elephants. Dogs are ranked after elephants, next on the list are cats and rats, sheep, and rabbits. And as a general rule, predators are usually smarter than herbivores.
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