GREAT WALL OF CHINA History of the Great Wall of China: The Great Wall of China is the national military defense project in the cold weapon war era with the longest time and the largest amount of construction in the world. It condenses the sweat and wisdom of our ancestors and is the symbol and pride of the Chinese nation. According to historical records, since the Warring States period, more than 20 vassals and feudal dynasties have built the Great Wall. The earliest was the Chu Kingdom. To defend the nomadic or enemy countries in the north, they began to build the Great Wall. Subsequently, Qi, Yan, Wei, Zhao, Qin, and other countries also began to build their own Great Wall for the same purpose. After Qin unified the six countries, the famous emperor Qin Shihuang sent Meng Tian northward to the Xiongnu, connecting the Great Walls of various countries. From Linyao in the west to Liaodong in the east, it stretched for more than 10,...
HOW WAS THE INTERNET BORN? THE INVENTION OF THE WORLDWIDE WEB
We can almost no longer live without it. But do you know how the internet was born? and who invented it? Let's find out together!
Today the Internet is used to search for information, post selfies, organize meetings, and many other things that have made life much easier for us. Yet the World Wide Web, like so many other inventions, was born for military purposes.
THE FIRST STEPS OF THE INTERNET
In 1969 the United States Department of Defense decided to create a communication system that was able to exchange information between computers scattered throughout the United States and that could resist even in the event of a World War (at the time many thought that a nuclear conflict with the Soviet Union was almost inevitable).
The goal was to structure a network - in English " web " - that did not deal with a single terminal but could continue to function even in the event that one of the "physical" media was destroyed.
Thus an experimental network was created called the Advanced Research Projects Agency Network (Arpanet), which connected and made dialogue between military computers of different types. Various universities were also "put on the net", that is, connected to each other with that system.
The first message via Arpanet was sent on October 29, 1969. The input was supposed to contain the word LOGIN, but only the first two letters were sent: after the system crashed.
A new era had begun, but hardly anyone noticed,
THE ORIGINS OF THE WORLDWIDE WEB
Twenty years later, in 1990, the English physicist Tim Berners-Lee perfected that original idea and invented the World Wide Web (the famous WWW ) as we know it today.
On March 12, 1989, in fact, he described for the first time a network to manage the information exchanged by scientists from CERN (the European Center for Nuclear Research) in Geneva. This system had been conceived as a spider web (which in English is called the web ) that would allow you to navigate through the various contents of the various computer archives of the research laboratories. Sometime later, on August 6, 1991, Berners-Lee, therefore, published the first website in the
Thanks to his brilliant intuition, today all the computers, tablets, and mobile phones in the world can connect to each other and can communicate.
This is how the "world spider web" was born, the World Wide Web, whose initials, www, are exactly what we type when we go on the Internet!
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