In the mid-19th century, the great British naturalist Darwin discovered a theory that caused a sensation around the world- biological evolution. In 1831, Darwin took part in the circumnavigation of the British Navy cruiser HMS Berger, sailing for five years in South America, conducting extensive expeditions to tropical and subthermal plants. After returning to China, based on a large number of observations and experiments in the biological world, he came to his own conclusion: he believed that the main reason for the formation of species and its adaptability and diversity was natural selection, and the reason why organisms constantly varied was to adapt to the natural environment and compete with each other. Adapting to changes in the living environment, it is strengthened generation by generation through heredity, and vice versa is eliminated. To sum up: natural selection, survival of the fittest, survival of the fittest. Darwin's theory laid the foundation for evolutionary biology. He also applied the theory of evolution to the thinking of human development, clarified the position of humans in the animal kingdom and its basis for animal evolution, and concluded that humans originated from ancient apes.
In later years, paleontologists formed the modern theory of human origin through the study of paleontological fossils and on the basis of Darwin's theory. However, does evolution really reflect the true picture of human origins? Did humans really evolve from apes? According to the theory of evolution, human evolution can be divided into three stages: ancient apes from 14 million to 8 million years ago, australopithecus from 4 million to 1.9 million years ago, and apes from 1.7 million to 200,000 years ago. Obviously, there is a 4 million-year gap between australopithecus and Australopithecus and 200,000-year gap between Australopithecus and Australopithecus, but until now, we have not found any fossils of the intermediate transitional stage of human origin, which challenges the traditional theory of evolution. In 1958, Dr. Rotan of the National Oceanographic Society took some wonderful human-like footprints on the 4.8-kilometer-deep seabed of the Atlantic Ocean. In 1968, Mooney, an underwater photographer in the city of Miami, saw a strange creature at the bottom of the sea, with a face like a monkey, a neck 4 times longer than a human, and eyes like human eyes but much larger than human eyes. In the 1930s, in the swampy area on the outskirts of Beive, South Carolina, the United States, the "lizard man" was found many times, they were 2 meters tall, with a large tail, each hand only 3 fingers, can walk upright, the strength is amazing, can easily overturn the car. Who are the ancestors of this humanoid creature that lives in water and swamps?
Therefore, some people have proposed the hypothesis that the ancestors of humans during the fossil blank period did not live on land, but in the ocean. That is to say, in the evolutionary history of humans, there have been aquatic sea ape stages of millions of years. Their reasoning is that 8 million to 4 million years ago, there was a large area of land in Africa that was submerged by seawater, forcing some ancient apes to live in the sea and evolve into sea apes. Millions of years later, the sea receded and the sea apes returned to land, the ancestors of humans. This is the "Sea Ape Theory".
"Sea ape theory" found that many of the physiological characteristics of humans are found in seals, dolphins and other aquatic mammals. For example, all primates are covered with thick hair, and humans, like water beasts, are bare-skinned and hairless; moreover, primates have no subcutaneous fat, but people are very similar to water beasts, and people have subcutaneous fat; third, the phenomenon of human eye glands secreting tears and discharging salt is also a characteristic of water beasts. This is unique among primates; moreover, women who give birth in water are painless, and babies are born with a love of water and have the ability to swim, all of which show that the relationship between humans and water is extraordinary.
The Propithecus, 18 million years ago, was the earliest humanoid. In it many human characteristics in the modern sense have been formed. For example, its large skull is very similar to that of modern man; its forelimbs and hind limbs have begun to divide labor. These are all conditions that must be met from apes to humans.
In recent years, a series of discoveries have revived enthusiasm for the idea of the extraterrestrial source of life. First of all, although life is diverse, they all have similar cellular structures, which makes people have to ask: since life on Earth evolved from inorganic things, why not produce diverse patterns of life? Also, the content of molybdenum on the earth is very low, but molybdenum plays an important role in life, why is this? Third, people continue to find organic matter originating in interstellar space from meteorites falling from the sky, including all the elements that make up life on Earth. This has convinced people that life is not just a monopoly on the earth. The hypothesis that humans originated from aliens is the latest hypothesis in the West in recent years, and it was proposed by Western scientist Marles, based on a 50,000-year-old skull fossil found in Santiago. After studying the skull, he believed that the human race represented by the skull had a much higher intelligence than that of our humans today, thus speculating that it was an alien skull, and then proposing the hypothesis that human ancestors were aliens. He believes that aliens interbreed with female apes with higher levels of intelligence on Earth, and the offspring born are humans, so aliens are the ancestors of humans.
Darwin's theory of biological evolution, which put forward the theory that man evolved from apes, caused a huge sensation, and it was called the three major scientific discoveries of the 19th century along with the law of energy transformation and balance, and the cell theory. The theory of evolution has produced epoch-making significance in the field of biology, in the field of thought, and in the practice of agricultural production and horticulture.
It is not difficult to see that the various hypotheses of the origin of modern human beings can be divided into two categories from the perspective of thinking: one is to attribute the cause of human origin to accidental factors outside the earth, that is, human beings are not the result of the evolution of the earth's organisms themselves, but are created by highly intelligent creatures from the depths of the universe, like aliens who created human beings; the other insists that the origin of human beings can only be considered from the development of the earth itself, no matter how it changes, human beings are always the result of the evolution of the earth's organisms themselves, like biological evolution.
Science is developing, research is developing, and human beings will surely use their own wisdom to unravel their own mysteries.