The British "Nature" magazine recently published a chemistry study: a new prediction model developed by British scientists believes that the main factor that drives humans to form such a large brain is ecology. The reason why the human brain is so big is a long-standing topic of debate in Biochemistry. This study helps people to further clarify the dispute.
Primates have a large brain capacity compared to most animals, while humans have the largest brain capacity in primates. For example, human brain volume is three times that of a close relative. If calculated by the relative size of the brain/body, the human relative brain capacity can be six times that of other viviparous mammals.
Why do humans evolve into unusually large heads? For decades, researchers have been arguing about this, and various theories have emerged one after another. Some people put forward the “social brain hypothesis†that the evolution of a larger brain can help us manage the increasingly complex social life; others also proposed the “high energy consumption organization hypothesis†that meat can make the brain evolve at the cost of the intestine. However, these theories have a fundamental problem: they rely on associated data and therefore cannot reveal causality.
This time, a new prediction model developed by researchers at the University of St Andrews in the United Kingdom, Merrizio Gonzalez-Floro and Andy Gardner, shows that the evolution of the size of the human brain responds to a large number of different factors, 60% of which are Ecologically, 30% is related to cooperation, and 10% is related to group competition. Relatively speaking, the competition between individuals is not so important.
In the attached news and opinion article, Richard Mike Eriks, a scientist at the Max Planck Institute for Evolutionary Anthropology in Germany, believes that the above findings are worth pondering because it means that social complexity is more likely to be human The result of the big head is not the reason, and human nature is more likely to originate from ecological problem solving and cumulative cultural evolution than social manipulation. (Reporter Zhang Mengran)
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