Historical data on the role of water on human beings, is historical data 20

The ancient kingdoms of the Silk Road eventually perished, all because the desert caused the oases to shrink and the lack of water led to their demise.

Loulan has always been a mysterious place for Chinese and foreign archaeologists, historians and geographers.

2,000 years ago, it was an important transportation hub on the Silk Road that connected north to south and east to west. China's ancient western region was the most prosperous in opening up to the outside world. The inhabitants also grow wheat and raise cattle and sheep. Their daily necessities are poplar wood, animal horns, and straw products.

Why did this illustrious ancient ** disappear without a trace in a very short period of time? What's hidden here?

In the process of Loulan's destruction, the destruction of the ecological environment played a role that could not be ignored. Loulan was once a vibrant oasis with a network of rivers. However, the huge "Sun Tomb" laid a hidden danger for the destruction of Loulan.

The "Tomb of the Sun" has a peculiar and spectacular appearance, and the tomb is surrounded by seven layers of thin and thick logs. The stakes are from the inside out, and the thickness is orderly. Outside the circle, there are rows of trees on all sides in a radial shape, which are not chaotic, magnificent, and the whole shape resembles a sun, which is easy to make people have all kinds of mysterious associations.

The prevalence of the "Sun Tomb" and the felling of a large number of trees made the Loulan people unknowingly bury their homes. According to the seven tombs that have been discovered, there are more than 10,000 logs, which is a staggering number.

The destruction of the ecology cannot be attributed only to the "tomb of the sun", and the combined power of various factors will inevitably lead to ecological imbalance. Loulan is located inland, the climate is dry, and over time, the original grassy oasis can no longer retain a piece of green. In the unearthed Chinese slips, we can learn about the reduction of the rations of the soldiers in Loulan, which reflects the difficulties after the deterioration of the environment in Loulan.

In addition, it is entirely possible that the war will directly lead to the demise of the ancient kingdom of Loulan. Before the maritime era, there was only one long "Silk Road" between the East and the West. The countries along the "Silk Road", especially Shanshan in the south of the Tarim, became important targets of plunder by the surrounding powers.

Driven by human interests, it is also an important force that leads to environmental change. In the 4th century AD, Loulan gradually fell into disuse. The main reasons for this are:

After the 4th century AD, the ancient road from Dunhuang to the Western Regions has been greatly developed, in addition to passing through Yizhou (now Hami), there is also a new development, more convenient traffic of the sea road. The change of transportation routes immediately caused Loulan to lose its position on the Silk Road.

Fancies... Cao Cao couldn't find a place with water on the march, and the soldiers were very thirsty, so he gave the order: ".

There is a plum grove in front of us, and the fruit is very rich, sour and sweet to quench our thirst. When the soldiers heard this, saliva flowed from their mouths, and (Cao Cao) took the opportunity to lead the soldiers to a place where there was a water source in front of them.

The long saw the upstairs powerful.

In ancient times, you can believe it (it is recommended to read history books, modern writers write with personal opinions), and modern times can not be fully believed, especially during the War of Resistance Against Japanese Aggression and the War of Liberation. . .

It's best to read it well, so as not to find it or even know that there is an answer on it. It's better to do some thematic integration, like economy, war, culture, etc. together. You can't just rely on flipping books, you have to be focused.

A lot of historical information is just a falsification of the victors, and it cannot be fully trusted.

Kim Il Sung's history is 100% made up. Even the name is fake, (formerly known as Kim Sung-joo).

There was a famous English ethnologist, Frey. After examining a large number of national historical legends, Benjamin found that almost all the ancient legends of the peoples of the northern hemisphere have legends about the "Great Flood". And the content is strikingly similar.

It makes people ask themselves in the midst of covering up the papers: Is there really a "great flood"? As we say in the idiom:

The so-called Great Flood event of antiquity was a huge, global flooding event! And months of rain are nothing more than a weather phenomenon that accompanies flooding. It only played a role in the great flood that almost destroyed mankind.

First, let's look at what the Bible says: "On February 17 the skylight opened, and the great abyss was completely breached. Heavy rain accompanied the storm for 40 days and 40 nights".

Noah's ark also drifted in the water for 40 days before finally running aground on the top of a high mountain. Sumerian sources, published before 3500 B.C., wrote: "The situation was unacceptably terrifying, and the terrible shouters of the wind in the air were all running away desperately, fleeing to the mountains without heeding anything."

Everyone thought that the war had begun. ”

In the study of ancient culture, there is a very famous ancient book, "Bopoca-Wufu", which is recorded as follows: "When the great flood came, the heavens and the earth became pitch black, and there was black rain, and it kept falling. People ran desperately. But it was still exterminated".

It is said that the ancient Babylonian Epic of Tergamis is the most complete account of the Flood in the world, as it was orally written by those who survived the Flood. According to his account, the flood was accompanied by a storm that flooded all the mountains on the continent almost overnight, and only those who lived in the mountains and fled to them survived.

Rain and dew moisten the seedlings and grow strong, and all things cannot grow without water. Water is the basic unit of life and the basic conditions for the occurrence, development and reproduction of life.

Modern medical measurements show that the proportion of water in the main parts of the human body is: brain, bones 22%, kidneys, bile 97%, muscles, blood vessels 83%. Water accounts for 70% of the total weight of the human body.

A person needs to drink more than 2 liters of fresh water every day, and 1 2 kilograms of water can be extracted from the air breathed by a human body every day. 4 and will die. As the saying goes:

A man may go three days without food, but not a day without water. This sentence vividly illustrates the dependence of human beings on fresh water for survival.

Water is not only inseparable from all living beings in the world, but also industrial and agricultural production, and it is indispensable all the time. From the perspective of crop cultivation, the water used per hectare during the growing period of crops is 23 34 tons of wheat, 22 27 tons of cotton, and 31 40 tons of sugar beet; From the perspective of animal husbandry, it takes tons of water to produce 1 kg of beef; From an industrial point of view, the production of 1 ton of steel requires 20 40 tons of water, 1 ton of paper needs 200 400 tons of water, 1 ton of man-made fiber requires 1200 1800 tons of water, and the production of 1 ton of synthetic rubber requires as much as 10,000 tons. Space, fresh water and food are the three pillars that underpin human existence.

The Earth that astronauts observe from the spacecraft is a blue "water ball", and water accounts for more than 10 of the total surface area of the Earth. Oceans, rivers, lakes, groundwater, swamp water, glaciers, permanent snow caps, permafrost bottom ice, biological water, atmospheric water and other water bodies have a total reserve of about 100 million meters3, and the average water depth can exceed 2,700 meters if this water is evenly distributed on the earth's surface. In this way, there is too much water in nature.

Groundwater has been available for a long time when there is no one, and it has nothing to do with people, and then our ancestors learned to dig wells, and it became much easier to live in the future, and then industrial civilization came, and the excessive use of groundwater, and the sinking of the earth's source of repentance, and the occurrence of groundwater pollution, poisonousness, and the occurrence of the cancer split in the village, do you remember?

Groundwater has been available for a long time when there is no one, and it has nothing to do with people.

Later, our ancestors learned to dig wells and life became much easier.

And then the industrial civilization came, and the excessive use of groundwater, and the sinking of the ground, and the contamination of groundwater, and the poisonousness, and the cancer village thing, do you remember?

I don't understand ... What's the matter? Yes.

1. Aristotle's understanding of the motion of falling bodiesIn order to explain why objects move, Aristotle proposed the "theory of natural destination". He believed that within the physical range that human beings could reach, every substance was composed of four elements: earth, water, air, and fire.

Each of these four elements has a natural requirement, both a tendency or intention to return to its original stationary natural position. He believed that four concentric spheres were formed between the earth and the moon, with earth below (i.e., the center of the sphere), water above the earth, air around or above water, and fire tending to rise and therefore in the outermost layer. From this ordering, the natural fate of each element is obtained.

Then the actual motion of the object depends entirely on the tendency or intention of motion of the largest number of elements. So the water vapor rises because there is too much fire element in it, and the water vapor rises to the high altitude because the water element is released into the sky, the water element regains its dominance, so there is rainfall. According to his principle, a large stone contains more earth elements than a small stone, so it falls faster.

He believed that when the object is not affected by external forces, it tries to return to its natural position, which is the theory of natural motion and the law of falling body proposed by Aristotle in the so-called theory of natural destiny. 2. Challenges to Aristotle's theory by successive generations of scientistsAristotle's theory was constantly criticized by scientists before Galileo, and in 1585, the Italian mathematician Benedetti used the fallacy method used by Galileo to refute Aristotle's theory of falling bodies in his book "Reflections on Diversity"; In his 1586 book Statics, Steffen and Jan da Groot collaborated at Delft to throw two shot puts, ten times the weight of the other, from a height of 30 feet, and the sound of the landing was made at about the same time, instead of the time it took for the heavy ball to fall was only 1 10 times that of the light ball, as stated by Ascot. Later, in "Dialogue on Two New Sciences", Galileo wittily and humorously criticized Aristotle's theory through the dialogue between Simpliqiu, who represented Aristotle's views, Salviati, who represented Galileo's new views, and Shagreto, who held a neutral view.

But whether Galileo did experiments on the Leaning Tower of Pisa has become a mystery debated in the scientific community. What is certain here is that Galileo qualitatively proved that the motion of a free fall is a linear motion with uniform speed through the famous Galileo inclined plane experiment with a gradual increase in the inclination angle of the inclined plane, and quantitatively calculated it.