What are the great inventions and discoveries in history?

Chronology of scientific achievements in the 20th century

Late 19th to early 20th century: Madame Curie, who studied the natural radioactivity of elements and discovered polonium and radium

1897 Year: Joseph Thomson discovered the electron

1900: December 14, Planck proposed the concept of quantum for the first time, which is regarded as the birth date of quantum mechanics

1903 Year: The airplane built by the Wright brothers took off in the United States

1905: Einstein proposed the special theory of relativity

1911: Rutherford discovered that an atom is composed of a nucleus and surrounding electrons Composed

1911: Heike Kamerling Onnes discovered the phenomenon of superconductivity

1912: Wegener published the theory of continental drift

1916: Einstein proposed the general theory of relativity

1917: Rutherford gradually discovered the hydrogen nucleus and (1919) the proton through alpha particles

1919: The advent of radio stations< /p>

1922: American astronomer Edwin Hubble announced that each galaxy is composed of millions of stars

1924: Soviet Russian Alexander Obalin published that biology is Slowly evolving from inorganic to organic organisms

1925: John Baird invented the first television

1926: Schr?dinger proposed the Schr?dinger equation.

1926: Robert Goddard of the United States launches the first liquid rocket (60 feet)

1928: George Gammo - discovers that solar energy is produced by the conversion of hydrogen into helium Energy generated (nuclear fusion) [source request]

1930: The advent of the electron microscope

1931-1960[edit]

1932: Chadwick discovered the neutron

1934: Fermi of Italy discovered the phenomenon of nuclear reactions

1935: Carothers invented nylon

1935: Hide Yukawa Shu proposed the first important theory of the strong interaction between nuclei

1937: Peter Kapitsa discovered superfluids.

Later, Landau gave a theoretical explanation in 1940

1940: The birth of laser (laser) technology

1940: The experiment of stereoscopic photography began

1942 Year: The first atomic reactor was completed in the United States

1944: The first computer was born

1945: The United States launched the first atomic bomb, and the world saw the power of atomic energy Huge power

1947: December 23, William Shockley, John Bardeen and others created the world's first transistor

1948: Feynman and others Proposes quantum electrodynamics

Late 1940s: Robert Burns Woodward completes a series of total syntheses, including reserpine and strychnine

1952: United States Launched the first nuclear fusion bomb (hydrogen bomb), 500 times more powerful than the missile dropped on Hiroshima

1953: James Watson of the United States and Francis Crick of the United Kingdom discovered DNA ( Double helix structure of DNA

1956: Li Zhengdao and Yang Zhenning published the paper "Questioning Parity Conservation in Weak Interactions"

1957: Soviet Russia launched the world's first The first artificial satellite

1959: Soviet space probe ─ takes the first photo on the moon

1961-1999[edit]

1961 Year: U.S. Mariner 2 reaches Venus

1961: Mariner 4 passes by Mars

1964: Cosmic 3K background radiation is discovered

1967: South African Surgery Dr. Barnard's First Heart Surgery Transplant

1967: Jocelyn Bell and Anthony Hewish discovered the regular pulses of pulsars while examining signals received by radio telescopes ,

1969: Apollo 11 mission - Neil Armstrong and Birds Aldrin were the first people to set foot on the moon

1973: The Fragments of ribonucleic acid (DNA) - inserted into genetic viruses and bacteria

1973: Kobayashi Makoto and Masukawa Toshihide experimentally observed CP destruction and proposed two new quarks, top quarks and bottom quarks; The number of quark flavors increased to six

1978: British scientists created test-tube babies

1983: Kelly Mullis invented the polymerase chain reaction method

1986: Carl Miller and Johannes Bednorz discovered (copper oxide) high-temperature superconductors

1995; Fermilab discovered the top quark; so far all six flavor quarks have been discovered< /p>