| Date. |
Event |
| 1900 |
General Quantum Theory - Max Plank |
| 1900 |
Alpha & Beta Particle Radiation Classification - Pierre
Curie |
| 1900 |
Gamma Radiation - Paul Villard |
| 1900 |
Sigmund Freud - Interpretation of Dreams |
| 1900 |
Tractor - Benjamin Holt |
| 1901 |
Safety Razor - King Gillette |
| 1901 |
Theodore Roosevelt - President |
| 1901 |
Vacuum Electron Tube - John Fleming |
| 1903 |
Controled Air Flight - Orvil & Wilber Wright - Kitty Hawk,
NC |
| 1904 |
Russia-Japan War |
| 1904 |
Psychoanalysis - Sigmond Freud |
| 1904 |
Radar - Christian Hulsmeyer |
| 1905 |
Special Theory of Relativity - Albert Einstein |
| 1905 |
Gyrocompas - Elmer Sperry |
| 1905 |
Intelligence Testing - Alferd Binet |
| 1906 |
Magnetic N. Pole Fixed - Ronald Amundsen |
| 1906 |
Electric Washing Machine - Alva Fisher |
| 1907 |
Rules of War - Hague Peace Conference |
| 1907 |
Mass-Energy Equivalence - Albert Einstein |
| 1908 |
Model T Ford - Henry Ford |
| 1909 |
N. Pole - Robert Peary |
| 1909 |
N.A.A.C.P - W. DuBois |
| 1910 |
Boy Scouts |
| 1910 |
Conditioned Reflex - Ivan Pavlov |
| 1911 |
War Plane - Turk-Italian War |
| 1911 |
China Republic |
| 1911 |
S. Pole - Ronald Amundsen |
| 1911 |
Atom - Nuclear Model - Ernest Rutherford |
| 1912 |
Isotopes - Frederick Soddy |
| 1912 |
Plate Tectonics - Alfred Wegener |
| 1912 |
Vitimins - F. Hopkins, Casimir Funk |
| 1913 |
Income Tax |
| 1913 |
Woodrow Wilson - President |
| 1913 |
Atomic Structure - Neils Bohr |
| 1913 |
Sub-Atomic Quantum Theory - Neils Bohr |
| 1913 |
Moving Assembly Line - Henry Ford |
| 1914 |
World War 1 starts |
| 1914 |
Panama Canal Opens |
| 1915 |
General Theory of Relativity - Albert Einstein |
| 1917 |
U.S. in World War 1 |
| 1917 |
Russian Revolution |
| 1917 |
Psychoanalysis - Sigmund Freud |
| 1918 |
World War 1 Ends |
| 1918 |
Influenza - 25,000,000 killed - 500,000 in
U.S. |
| 1918 |
Automatic Rifle - John Browning |
| 1919 |
Trans-Atlantic Flight - Alcock & Brown |
| 1919 |
Mahatuma Gandhi initiates Satyagraha |
| 1919 |
League of Nations |
| 1919 |
Proton - Ernest Rutherford |
| 1920 |
19th Amendment - Women's Sufferage |
| 1921 |
Insulin - Frederick Banting, Charles Best |
| 1922 |
Polymerization - Hermann Staudinger |
| 1923 |
Iconoscope (TV) - Vladimir Zworkin |
| 1924 |
Stalin - Soviet Union |
| 1924 |
Frosen Food - Clarence Birdseye |
| 1925 |
Television Transmission - John Baird |
| 1925 |
Exclusion Principle - Wolfgang Pauli |
| 1925 |
Quantum Mechanics - Werner Heisenberg, Erwin Schrodinger |
| 1926 |
Liquid Fuel Rocket - Robert Goddard |
| 1926 |
Motion Picture Sound - Warner Brothers |
| 1926 |
True TV Image |
| 1927 |
Solo Trans-Atlantic Flight - Lindbergh |
| 1927 |
Big Bang Theory & Expanding Universe - George LeMaitre |
| 1927 |
Uncertainty Principle - Werner Heisenberg |
| 1928 |
Penicillin - Alexander Fleming |
| 1928 |
Electric Razor - Jacob Schick |
| 1928 |
Cathode Ray Tube (TV) - Vladimir Zworkin |
| 1929 |
Depression |
| 1929 |
Car Radio - Motorola |
| 1929 |
Universe Expansion Evidence & Hubble Constant - Edwin
Hubble |
| 1929 |
"Scotch" Tape - Richard Drew |
| 1930 |
Cyclotron - Ernest Lawrence, U.S. |
| 1930 |
Pluto Discovered - Clyde Taumbaugh, |
| 1931 |
Cyclotron - Ernest Lawrence |
| 1931 |
Heavy Hydrogen Discovered - - Harold Urey |
| 1932 |
Electron Microscope |
| 1932 |
Celestial Radio Wave Detection - Karl Jansky |
| 1932 |
Neutron - James Chadwick |
| 1932 |
Positron - Carl Anderson |
| 1933 |
Franklin Roosevelt - President - New Deal |
| 1933 |
Frequency Modulation - Edwin Armstrong |
| 1934 |
Neutron Induced Radiation - Enrico Fermi |
| 1934 |
Practical Radar - Robert Watson-Watt |
| 1935 |
Nylon - Wallace Carothers |
| 1935 |
Commercial Coloe Film - Kodak |
| 1935 |
Richter Scale - Charles Richter |
| 1936 |
China-Japan War |
| 1936 |
Helicopter - Heinrich Focke |
| 1936 |
Jet Engine Frank Whittle |
| 1938 |
Minimum Wage - Fair Labor Standards Act |
| 1938 |
Nuclear Fission - Otto Hahn, Fritz Strassmann |
| 1938 |
Xerography - Chester Carlson |
| 1939 |
World War 2 starts |
| 1939 |
Einstein Letter to Roosevelt - Build A-Bomb |
| 1939 |
Practical Heliicopter - Igor Sikorsky |
| 1940 |
Network Television Broadcast - NBC |
| 1940 |
Penicillin - Howard Florey, Ernst Chaun |
| 1941 |
America in World War 2 - Pearl Harbor |
| 1941 |
4 Freedoms - Franklin Roosevelt |
| 1941 |
Manhattan Project (A-Bomb) begun - Franklin Roosevelt &
Robert Oppenheimer |
| 1941 |
Plutonium |
| 1942 |
Holocaust - Final Solution - Wannsee Conference |
| 1942 |
United Nations |
| 1942 |
Nuclear Reactor - Enrico Fermi |
| 1944 |
D-Day - Normandy Invasion |
| 1944 |
Ball-Point Pen - Lazio Biro |
| 1945 |
A-Bomb Created & used against Japan |
| 1945 |
World War 2 Ends |
| 1945 |
Computer - Electronic Numerical - ENIAC |