How many hours are there in a day? Obviously the answer is 24 hours. But recently, scientists from Durham University and the British Maritime Calendar Office discovered that our day is slowly getting longer. This means that one day on the earth in the future may no longer be 24 hours.
In their research, scientists discovered that the moon’s rising and falling tides on the surface of the earth will drag the earth’s rotation. This phenomenon is called “tidal acceleration”, which slows the earth’s rotation speed to a certain extent. In addition, the rising sea level caused by the warming of the earth’s climate and the slow electromagnetic effect of the earth’s nuclear will also cause the earth’s self-transition to be slow. Since the rotation speed of the earth involves many factors, it is difficult to directly calculate its speed. So the scientists analyzed the astronomical data recorded from 720 BC to 2015 AD, and then compared the results calculated by the computer model to find out the law of the earth’s rotation speed, and finally estimated the length of a day at 1.8‰ per 100 years The average speed per second is increasing. But we don’t have to worry about 25 hours a day when we wake up from sleep, because according to scientists’ calculations, if we extend our day’s duration by 1 hour from the current basis, we need to wait 200 million years.
Why use firing a salute as a kind of etiquette?
The firing of salutes originated in the United Kingdom. It is said that the fire was originally fired by the British navy with warship artillery. It was a practice of releasing the shells in advance of showing no hostility to warships entering friendly countries. Later, it gradually evolved into a kind of etiquette to pay tribute to each other. Since the largest battleship at the time was equipped with 21 cannons, firing 21 cannons became the highest etiquette and a courtesy enjoyed by the head of state. Generally speaking, singular salutes are fired. It is said that it was considered unlucky to fire even-numbered salutes, but now they are not strictly adhered to this rule.
What kind of public toilets in medieval Europe
As early as the Middle Ages, public toilets appeared on the streets of Europe to provide convenience for those who are away from home. But can you imagine that the so-called public toilet is actually nothing more than a person wearing a big cloak and two buckets. The “public toilets” were wearing big cloaks, and there was a bucket beside them. When there are guests, they open their cloaks to surround the residents, and use two different buckets to solve the problem. When the container is full, the “public toilets” will find the riverside and dump the garbage into the river. The business is still prosperous.
The Origin of “Overseas Children”
”Overseas children” is a good name for our compatriots living abroad, which means that compatriots living abroad still have a heart for the motherland and have a sincere patriotism. But “overseas children” actually originated from “domestic children”. According to legend, during the Zhenguan period of the Tang Dynasty, Emperor Taizong of the Tang Dynasty tried archery competitions, and the minister advised: “People hold their bows in front of the hall and are so close to you. If there are arrogant and ignorant people shooting secretly, it will be extremely detrimental to Sheji.” Said: “The king regards the four seas as a family, and within the borders, all skins are naked, and the skins are put in their belly one by one, but they are arrogantly jealous!” This means that I regard all people in the four seas as pure children, sincerely. How can you distrust them? Since then, people have derived the phrase “indigenous child” from Tang Taizong’s words. “Overseas children” is transformed from the term “overseas children”.
Beijing is the most named city in the history of the world
According to statistics, there are more than 60 names and aliases in the history of Beijing, which can be counted as the city with the most names in the history of the world. The Beijing area was historically known as Youling, Jizhou, Ji, Yan, Guangyang, Yuyang, Youzhou, Guangyou, Fawu, Yanjun, Zhuojun, Nanjing, Xijin, Zhongdu, Daxing, Dadu, etc. It wasn’t until the first year of Yongle in the Ming Dynasty (1403) that it began to be called Beijing. In 1421, it was renamed Jingshi. In the Qing Dynasty, it was changed back to Beijing. In 1928, it was changed to Peiping.
China’s post-80s and post-90s have the highest proportion of houses in the world
A survey conducted by HSBC in the UK found that 70% of China’s “millennials” own a house, ranking first in the world. In the West, the “millennial generation” is also called the Qing generation, which is roughly equivalent to China’s “post-80s” and “post-90s”. HSBC conducted a survey of about 9,000 “millennials” in 9 countries around the world, and the results showed that China’s “millennials” own the highest proportion of home ownership, reaching 70%. The remaining countries are ranked as follows: Mexico (46%), France (41%), the United States and Malaysia (both 35%), Canada (34%), the United Kingdom ( 31%), Australia (28%) and the UAE (26%). The survey also found that 83% of all young people without houses said they would buy a house in the next 5 years. Among them, young people in Mexico and Malaysia have the greatest desire to buy a house, and 94% have no house. Young people without houses in China, followed by 91% of young people without houses. French young people without houses pay little attention to real estate, only 69% have plans to buy houses. The survey pointed out that the proportion of young people with houses in the UAE who rely on their parents to buy houses is the highest, reaching 50%. %; Mexico and China are close behind with 41% and 40% respectively.
Why does lamb taste good?
The nutritional value of lamb is very high. The cholesterol and fat content is lower than pork, and it is rich in iron. It is a delicacy in the hearts of many people. However, some people simply cannot enjoy it because of the good taste of lamb. The good taste of lamb mainly comes from the volatile fatty acids of lamb and goat milk. The origin of this odor is roughly similar to human underarm odor, which is caused by the excrement produced by about 10 million bacteria in the armpit. Therefore, for some people, it is excusable for the good taste of sheep to make them nauseous.
“Compendium of Materia Medica” is the first popular manuscript
Movable type printing appeared in the Song Dynasty. Many books before this have also been engraved editions. However, after the Compendium of Materia Medica was written, Li Shizhen moved around everywhere and could not find a place to engrave it. Those who desperately needed this book had to copy it by hand. Twelve years later, when a publisher in Nanjing saw a profit, he engraved the book. In 1593, the “Compendium of Materia Medica” had not been completely engraved, and Li Shizhen passed away. Before his death, he also hoped that the court would help to publish it, so that the book could spread more widely and benefit the people. Unfortunately, this great work did not attract the attention of the Wanli emperor, and it was criticized until the early Qing Dynasty. In 1659, the Polish missionary Bummig first translated the plant part of the book into Latin and called it “Chinese Flora”. This medical book spread to Europe and Japan and contributed to the development of modern natural science.
How is body odor produced?
Body odor is mainly caused by some fatty secretions produced by sweat glands, which are more common in the armpits, genitals, and anus. But sweat gland secretions are not the direct cause of body odor-there are a lot of bacteria living on our skin. These bacteria swallow and digest the fatty substances secreted by sweat glands to form body odor.