The great achievements of mankind in the 20th century.

1, Theory of Relativity: 1905, Einstein, the greatest scientific genius in the 20th century, founded the special theory of relativity at the age of 26, which paved the way for the theoretical application of atomic energy.

2. Quantum mechanics: Planck put forward the radiation quantum hypothesis in 1900; 1905, Einstein put forward the concept of light quantum; 19 13 years, the Copenhagen School headed by Bohr (Born, Heisenberg, Pauli, Dirac, etc.), and a large number of physicists such as De Broglie, Schrodinger, Fermi, Compton, Einstein and * * * jointly founded quantum mechanics.

3. Gene theory: From 19 10, American geneticist Morgan and others conducted a lot of experimental research and established the gene theory on the basis of cytogenetics; From 65438 to 0953, biologists Watson and Crick published the paper "Molecular Structure of Nucleic Acid" in Nature, and put forward the theory of DNA double helix structure model, which marked the birth of molecular biology.

4. Nuclear energy technology: 1939 Atomic splitting experiment was successful; 1945, the United States made the first atomic bomb; 1956, mankind began to use nuclear energy to generate electricity; 1952 the United States exploded the first hydrogen bomb.

5. Space technology: The first artificial satellite was launched by the Soviet Union in 1957; 1969 American Apollo 1 1 Spacecraft Landing on the Moon; 1977, the United States launched the Voyager 1 and Voyager 2 probes, and sent back a large number of pictures of eight planets and power stars in the solar system. The detector carries a gold-plated record with earth information; 198 1 year, the United States successfully launched the first space shuttle "Columbia".

6. Internet technology: 1969 The world's largest computer network, invented in this century, consists of many internet networks. Together with TV sets, the world news that happens every day can spread to every corner of the earth in time, which has opened the curtain of the information age.

7. Laser technology: The theoretical basis of laser originates from physicist Einstein. 19 17, Einstein put forward a brand-new technical theory "the interaction between light and matter".

1960 on may 15, a scientist at Hughes laboratory in California announced that he had obtained a laser with a wavelength of 0.6943 micron, which was the first laser ever obtained by mankind, and thus became the first scientist in the world to introduce laser into practical fields.

8. Microelectronics technology: 1943 The first electronic computer was manufactured in the United States; 1947 invented the transistor, which triggered the semiconductor revolution in the electronic field, and then large-scale integrated circuits began to be applied. 1948 manufactured the first transistor radio.

9. Cloning technology: 1997, British scientists successfully bred Dolly the cloned sheep.