What were the inventions and discoveries in the 20th century?

1945 In August, Pandora's Box was opened in Hiroshima and Nagasaki, Japan. At that time, the international community just wanted to overwhelm each other with this powerful and deadly destructive weapon. The United States successfully conducted its first test explosion in New Mexico in July, 1945, followed by the Soviet Union in June, 1949, Britain 1952, France 1960 and China 1964. According to the declassified data, for the explosion of this atomic bomb, China * * *.

2. Space shuttle

1959, the Soviet unmanned spacecraft successfully landed on the moon for the first time and took a lot of photos. The feat of Apollo landing on the moon in the United States in the late 1960s was the first step for mankind to set foot on a planet other than Earth. Since then, the United States has gradually left the Soviet Union behind in space exploration. After the appearance of the space shuttle, the chances of human success in going to outer space have greatly increased. Scientists predict that mankind will travel to outer space after 2000.

3. artificial satellite

The first artificial satellite was successfully tested by the Soviet Union on 1 October 4th 1957, followed by the American explorer 1 on1October 4th 1958,1. Since then, more and more artificial satellites have floated out of the atmosphere. Satellites were originally used in military science and technology, and gradually evolved into a family of satellites with different purposes such as communication, mapping, detection and meteorology.

4. TV set

1923, the soul of television CRT was born. Television technology was widely used in the 1940s, and 1954 ushered in the era of color television. After the 1960s, almost all countries established TV stations. This square box has created countless happy times for mankind.

5. Internet

The most primitive computer network, at first, only connected different computer hosts in the research room of the college. When this technology can be used by people simply by connecting modems and telephone lines, the network immediately became the most influential invention at the end of this century. The new information dissemination mode created by the network has rapidly affected more and more levels. E-mail, online shopping and online dating have redefined the network. People can connect the whole world in their hands with a thin telephone line.

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