On "Pursuing the Footprints of Life"
There is still no reasonable explanation for the origin of human beings. With the progress of modern science and technology and archaeology, the mystery of human evolution has gradually become clear, and Darwin's theory of evolution has been challenged more and more. No matter how different the mainstream schools of evolution are, their imagination of human ancestors' figure is very similar. It is believed that there are two mysteries in human physique: one is upright, and the other is sparse body hair. Darwin's theory of biological evolution points out that human beings evolved from apes. Combined with contemporary archaeological achievements, the time schedule of human evolution is Australopithecus (14-8 million years ago), Australopithecus (4-19 million years ago) and Ape (17-200,000 years ago). 1960, Thomas Hardy, an Englishman, put forward the theory of "sea ape", pointing out that 8-4 million years ago, apes went to sea to live and then returned to land. The evidence is that human skin is naked, without thick body hair, with subcutaneous fat, lacrimal gland secretes and excretes salt, and the physiological mechanism of sweating and sexual behavior is like that of aquatic animals, while primates have thick body hair and no subcutaneous fat, which is very different from human beings. People give birth in water without pain, babies naturally like water, and people's reaction when diving is similar to that of seals. However, this theory can't explain the missing ring of fossils 4 million years ago, and humans have not found any marine ape fossils so far. Some scientists have suggested that during the 4 million-year vacancy period, Australopithecus and a certain marine organism had genetic recombination, that is, the theory of "the combination of land and sea ancestors". As for what kind of marine life it is, there is no evidence. Some scientists believe that human ancestors were formed by the combination of aliens and female apes on earth. In a word, the mystery of human origin is still controversial and needs evidence. Almost everyone thinks that the characteristics of human hair are changed from hirsutism. Compared with mammals, human beings have fine hair and soft skin. The characteristics of human fur are unique in nature. Many people think that human ancestors wore animal skin clothes, which led to the gradual degradation of body hair. Obviously, this can't stand scrutiny. Most people in the tropics or Africa didn't wear clothes until modern times. How long are their bodies exposed, but Africans have the least body hair. White people who live in cold areas for a long time have thicker body hair. The only explanation is that human hair is not full and has not degenerated! Darwin used the theory of sexual selection to explain human nudity. This explanation is also far-fetched. "Is there a chicken before an egg, or an egg before a chicken?" This is an ancient philosophical proposition. For thousands of years, many philosophers have tried to answer this question, but they can't find convincing arguments, so until today, this question is still inconclusive. From the evolutionary point of view of biological genetic variation, the author thinks that there should be eggs before chickens. To sum up, no matter from the evolutionary perspective of genetic variation or from the perspective of hybrid evolution of new species produced by genetic differences, we can draw the conclusion that eggs came first, then chickens came.