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Even more "folded" than the human brain, the dolphin brain existed millions of years before
![dolphin](https://assets.shortpedia.com/uploads/2023/01/07/1673095016.webp?tr=w-1200,h-600,cm-pad_resize,bg-F3F3F3)
Even more "folded" than the human brain, the dolphin brain existed millions of years before the emergence of humans. Scientists frequently gauge IQ by counting the "folds" in the brain.