American scientists released their son and chimpanzee together and lived for 9 months, why suddenly terminated

Man belongs to the primate species, so what is the difference between man and animals?

Descartes put forward the philosophical proposition: I think, therefore I am.

The phrase roughly means: The only thing I can be sure of is the existence of my mind because when I doubt the other, I cannot at the same time doubt my mind.

Humans already have thoughts from birth and they don't stop until they die.

Archaeology shows that in ancient apes in the process of evolution into humans, the brain volume has been developing, the hominid brain volume is only 400ml ~ 500ml, while the modern human brain volume is up to 1500ml.

After several experiments have shown that the evolution of ancient apes depends on brain volume. However, before reaching this conclusion, scientists have done a large number of experiments, and some scientists even used their sons with gorillas put together for experiments, but after 9 months, suddenly terminated.

Winthrop Kellogg is a famous American psychologist and philosopher, who joined the U.S. Army Expeditionary Force during World War I as a pilot, and after the end of the war, he was admitted to Indiana University and Columbia University.

In 1929, he became a professor at Indiana University. While teaching at this university, Winthrop Kellogg began a famous experiment - apes, and children.

As a psychologist, Winthrop Kellogg has always wondered whether it is the environment or the genes that make people human. With the support of his wife, Winthrop Kellogg set out to conduct research.

Indiana University had ample experimental conditions, and Winthrop-Kellogg only had to select the right subjects.

In 1931, Winthrop Kellogg purchased a 7.5-month-old female chimpanzee, "Guia," from a zoo.

The subjects have been selected, so are the control subjects, and how do choose them?

Winthrop Kellogg considered using a colleague's child or a volunteer's child to experiment, but after asking a few people, he gave up. People were worried about the children being harmed and were reluctant to give them to him for the experiment.

Just when Winthrop Kellogg was ready to give up, his 10-month-old son Donald came into his eyes, and he had a bold idea in his mind - to use Donald for the experiment.

At first, his wife did not support his experiment, but after Winthrop Kellogg persuaded her, she agreed, and they only put "Goya" and Donald together to live.

In this way, the 7-month-old "Goya" became Donald's "sister", at this time Donald simply did not realize the difference between humans and apes, he just treats this ape as a small partner.

Winthrop Kellogg and his wife raised "Goya" as their daughter, dressing her and teaching her to walk, and although she sometimes still walked on all fours, she was slowly freeing her hands.

In terms of learning, "Guia" is much smarter than Donald, he learned to walk first, and at the same time will express his feelings through his demeanor, even to go to the toilet will ask Winthrop Kellogg.

On the other hand, Donald is a slow learner. He has been with the chimpanzees for a long time, and some of his habits have changed a lot, preferring to crawl on all fours rather than walk, and even learning the chimpanzee's roar from "Goya".

"Goya's behavior became more and more human-like, while Donald's behavior was degenerating and he became more and more chimpanzee-like. However, after nine months in the human population, he could no longer integrate into the race, he considered himself a "human" and missed his family. "Guia died at the age of 3.

After Donald resumed his normal life, he was very slow to learn at first, but after a few months, his behavior became human again.

From the 9 months of experiments, Winthrop Kellogg found that the human growth environment is very important, in addition to the brain's capacity to create humans, the environment is also very important.

This further confirms the core idea of Darwin's Origin of Species: "survival of the fittest".

Darwin's "Origin of Species" explains the evolutionary process of human beings, in the evolution of the environment, plays a decisive role in the change, leaving the forest southern apes, to survive the liberation of both hands and feet, and finally in the process of adapting to the environment evolved into humans.