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People in northern countries have larger skulls and brains than those in southern countries, due to the need for larger visual areas in the brain to handle dimmer lighting. This was found in a study by the University of Oxford.
Researchers at the University of Oxford have found that there is a direct correlation between latitude and brain size. People in northern countries have larger skulls and brains than those in southern countries. That doesn’t mean they’re smarter, but rather that they need larger visual areas in the brain to handle dimmer lighting. The correlation is very specific: In the Oxford study, which included 55 skulls, each skull could be matched to the latitude of the country where the owner lived only by its size.
Learn more about brain size:
The animal with the largest brain is a sperm whale, with the average sperm whale brain weighing 17 pounds (about 7.7 kg). The smallest mammalian brain is that of the mouse lemur, weighing about 0.004 pounds (about 2 grams).
Shrews have one of the largest brains for their body size. Some shrew species retain up to 10% of their body weight in their brains.
If all the wrinkles in a human brain were explained, it would be the size of a pillowcase.
