Human Brain

Human Brain: Why the human brain became smaller 3000 years ago, research explains why

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The human brain is a fascinating subject to study for our scientists. They hope that by studying it, they will also understand the evolution of human beings. Scientists are also studying the origin of the brain itself, in which the biggest question is how this brain developed into a super-intelligent brain. About three thousand years ago, the size of the human brain had become smaller. But the reason for this was not yet known. The reason for this has now been found in new research based on the study done on ants.

Why is more or less the size of the brain?
It is believed that this study can be a big step towards understanding human development. By studying ants, researchers have discovered why the size of the brain can increase or decrease. The reason behind the growth and shrinking of the brain has also been found.

Increasing in size
Understanding the cause and effects of brain development will help us understand humanity. So far, it has been clearly shown that the size of the brain has been increasing throughout the history of human development. At the same time, the fact has not always been accepted that the human brain had decreased in size during the Pleistocene period.

Today there is a more miniature mind than the brain of that era
When exactly this change took place is not yet known precisely. Dr. Jeremy DeSilva, a co-author of this study and Dartmouth College, said that the shocking fact about today’s humans is that our brains are smaller than the brains of Pleistocene ancestors. Why is it that it was a matter of mystery to anthropologists?

Variety of specialists
To solve this mystery, a team of researchers from different disciplines studied the historical patterns of human brain development. For this, he got more information from the study of ants. Experts such as biologists, anthropologists, behavioral ecologists, and emergent neurobiologists contributed to this study.

Ant and human

Dr. Dames Tranello of Boston University of this study says that experts shared their views on brain development and found that research on humans and ants can help understand this issue. This study was published in Frontiers in Ecology and Evolution.

When did the significant changes happen
The researchers analyzed a set of human skulls and 985 fossil data to determine the point of change. They found that the human brain had grown in size during the Pleistocene, between 21 million and 1.5 million years ago. But it became smaller in the Holocene period three thousand years ago. This past guess is more ahead.

Only then changed in the human ancestors of that era
Tranello says that many people know that the human brain is abnormally large. Especially according to his body, he is pretty big. The size of the human brain has increased dramatically over history. But three thousand years ago, this was unexpected. This was the time when Homo was developing, and technological development was also taking place. With this, better food and larger social groups were being formed.

The researchers analyzed the brain size, structure, and energy use of several ants and found that the brain can improve itself and reduce its size when engaging in such activities. Humans and ants have very different social aspects, so their brains develop differently. The tiny brain consumes more energy. But the development of collectivism created conditions for the brain to decrease in size.