According to the research of archaeologists, Australopithecus is the distant ancestor of human beings, living from 8 million years to14 million years ago, while Australopithecus and apes are close relatives of human beings. Australopithecus lived from1700,000 to 4 million years ago, and apes lived from 200,000 to1700,000 years ago. However, how did Australopithecus evolve into Australopithecus and apes? Between 4 million and 8 million years ago, that is, after Australopithecus, before Australopithecus, the fossil data was almost blank, which was called the fossil blank age. Alice Hardy, a British anthropology professor, believes that human ancestors did not live on land here, but in the ocean. In the history of human evolution, there is a stage of aquatic sea apes for millions of years. They are forced to soak in the water all day to avoid the attack of wild animals or because of the large-scale rise of sea water. In order to adapt to marine life, the hair on the body has degenerated to reduce the yin force when swimming; Thickening of subcutaneous fat reduces heat dissipation and keeps body temperature constant, which is very similar to dolphins; It is convenient for women to raise their children in the water, and the breasts become bigger and the hair becomes longer, which is convenient for babies to grasp; In water, you must have the ability to stand upright and control your breathing. Millions of years later, the sea receded and the sea apes returned to land. This is the ancestor of mankind.
Some people decompose the word "sea" into "water is the mother of mankind", which embodies the relationship between man and water and can better see the relationship with the sea. Life was born in the ocean, although it has developed for hundreds of millions of years from the ocean to the land, from the low level to the high level, and then to the human being as the spirit of all things. But in the final analysis, the ocean is the most primitive "root" of human beings, so people will inevitably leave the mark of the ocean.
The most obvious is the composition of human blood. After analysis, the mass percentages of chemical elements such as sodium, potassium, calcium, chlorine and oxygen in human plasma are very similar to those in the ocean. Although the salt content of human blood is about 1/10000, and the salt content of seawater is as high as 30/1000 to 35/1000, the salt content of seawater is very low in the primitive ocean where life was born. Marine invertebrates from unicellular to multicellular animals have the same salt content in their body fluids as seawater. When the total fin fish struggles to climb onto the land, it also keeps some substances in the sea water in the blood and passes them on to amphibians, reptiles and mammals in turn. When they developed slowly on land, the ocean accepted various substances washed by land for hundreds of millions of years, including salts, and gradually increased the salt content, so the salt content of human blood was lower than that of the current seawater.
Mammalian fetuses, including humans, develop in amniotic fluid suspended in the mother's womb. This kind of amniotic fluid is actually equivalent to a small "ocean" where the fetus bathes, similar to holding its breath and diving in the ocean. Experiments show that newborn babies have the instinct to hold their breath and swim. Children may be trained to swim 5-7 days after birth. Between the Philippines and Indonesia, there is a minority-Baju people, who live at sea all the year round. Children are thrown into the sea as soon as they are born, and those who can't swim will drown, but the technology handed down by their predecessors keeps them from drowning. Healthy babies have withstood this baptism and can swim and dive like money. Babies are being trained to swim in many parts of the world. For example, in the former Soviet Union, there were 3,000 babies swimming, and the results were amazing. A one-and-a-half-year-old girl in Germany can swim in the water for 22 minutes. A baby under a full moon and a one-year-old baby are playing with two trained dolphins in the sea, jumping out of the water together, or floating on the water to rest or being carried by dolphins. They are very happy. Some countries in the world have given birth in water, such as France, New Zealand, Belgium and the former Soviet Union. Since the first baby in the former Soviet Union was born in water, hundreds of people in the world have successfully given birth in water, and no one has suffered misfortune. After leaving the mother's body, the baby instinctively swims and dives in the seawater, which is amazing and shows the close relationship between human beings and the ocean.
Even now, on thousands of islands in the South Pacific, there are still people who call the sea their home for generations. Men and women call it a sea man and a sea woman, and their children are called Hai Wa. They live by the sea and live a primitive life. Men and women dive into the sea naked, fishing and catching crabs. As soon as the children went out, the villagers imitated the "chirp" of dolphins and guided them to swim like dolphins. Raoul people in Solomon Islands bathe their babies with seawater, and 2-year-old children in Marshall Islands can swim like fish.
The water content of various organs and tissues of human body accounts for about 70%, and it is even more during embryonic development. On the third day of embryo development, it contains 97% water, which is as much as that of jellyfish in the ocean. After three months of development, it contains 9 1% water and 80% newborn babies. In a year, the water content on the body will be the same as that of adults. In addition, the normal metabolism of human body is inseparable from water, and all life activities such as digestion, circulation and material exchange are completed with the participation of water. The human body is also equivalent to a small ocean. The heart sends blood to the whole body at a speed of 3.5-5.5 liters per minute, and the kidneys filter the whole body blood every 4 minutes to eliminate human waste. People need to supplement 2.5 liters of water every day. People who live to the age of 60 have already drunk more than 60 tons of water, which keeps moving in the human body like oceans and rivers. When the water loss of human body reaches 14%- 15%,
Human tissue fluid is the internal environment of cell life, and its electrolyte composition and trace elements are very similar to those of seawater. Isotonic seawater can exchange substances with animal blood, and human white blood cells can survive in seawater. A French scientist made an experiment by taking dog's blood and injecting seawater with the same salt concentration as the blood. As a result, the dog was still alive. After a few days, Wan fully recovered his vitality. Marine reptiles, such as crocodiles and turtles, and seabirds, such as albatrosses, have special salt-discharging glands between their eyes or noses, which can continuously discharge droplets to eliminate excess salt in their bodies. People also have lacrimal glands in their eyes. No matter when you are excited or sad, it will make people cry. Although it has become a means for people to express their feelings, its initial function may be the same as that of other animals.
So everyone yearns for the sea, especially when they are lovelorn or tired from work, as long as they take a nap at the seaside, they will feel refreshed. If you bathe in seawater, many minerals beneficial to human body, such as potassium, sodium, boron, arsenic, fluorine and other elements, as well as many radioactive elements and antibiotics, and even many bioactive substances excreted by plankton metabolism, can penetrate into human body through pores, so that the inorganic substances in somatic cells can be balanced. For example, the balance of potassium and sodium ions in urine changes obviously, human enzymes and microorganisms are supplemented, cells are activated and their functions are active.
From this, people know that returning to the ocean is the best natural environment for life activities. Therefore, in many places, marine tourism and marine treatment have mushroomed, and marine parks, marine parks, bathing beaches, seaside sanatoriums and marine treatment centers have been established. According to the individual's illness, natural substances such as sea water, sea sand, sea mud, ocean space and marine life are used to treat diseases and keep fit, which has benefited a lot. There are many strange ocean therapies, such as being in the sea and listening to the ebb and flow of the tide, which can promote the secretion of some healthy enzymes, acetylcholine and other substances, regulate the blood flow of the human body, excite the nerves, and have curative effects on endocrine disorders, stomach diseases, and insufficient blood supply to the brain. Seeing the blue of the sea can cure lung diseases and mental patients. The ups and downs of the surge, whose regularity is just equal to the rhythm of people's sleep, have excellent hypnotic effect and have remarkable curative effect on asthma, encephalopathy and insomnia.
60% of the cities in the world are located within 50 kilometers from the coast, and 2/3 of the population live within 80 kilometers from the coast, which reflects the close relationship between human beings and the ocean. At present, there are 5.8 billion people on the earth, and it will reach 8 billion by 2025, and it is overcrowded everywhere. Some people imagine that human beings will return to the ocean and live on the bottom of the sea. Scientists predict that by the next century, the population of the earth110 will move to ocean cities and human beings will return to the ocean. The United States tried to build undersea houses for people to live in, and also trained dolphins to be traffic policemen and deliver newspapers and other articles. There are now more than 100 underwater laboratories. It is estimated that by 2 1 century, a number of submarine factories, underwater cities and underwater parks will be built on the continental shelf. What's more, some scientists are thinking about transforming humans into new people who can adapt to the marine ecological environment, that is, amphibians. Since life originated from the ocean, the ocean is always the golden environment for life from bottom to top. Humans have deciphered the genetic code of some organisms-ribonucleic acid, and transformed themselves by genetic engineering. Perhaps one day, underwater breathing will no longer be an obstacle for human beings to inhabit the sea.
Therefore, when people come to the ocean, it is possible to return to the ocean in the end!