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The Lower Paleolithic period lasted over 3 million years, during which there many human-like species evolved including toward the end of this period, Homo sapiens.The original divergence between humans and chimpanzees occurred 13 (), however interbreeding continued until as recently as 4 Ma, with the first species clearly belonging to the human (and not chimpanzee) lineage being ...
Download as PDF; Printable version; ... List of science timelines; The year 1900 in science and technology involved some significant events, ...
1900 Fly swatter. A fly swatter is a hand-held device for swatting and killing flies and other insects. The first modern fly-destruction device was invented in 1900 by Robert R. Montgomery, an entrepreneur based in Decatur, Illinois. [75] On January 9, 1900, Montgomery was issued U.S. patent #640,790 for the "Fly-Killer". [76] 1900 Thumbtack
Brief History of Electronics Timeline ; Date Invention/Discovery Inventor(s) 1900: Old quantum theory: Planck 1905: Theory of relativity: Einstein 1918: Atomic transmutation: Rutherford 1932: Neutron: Chadwick 1932: Particle accelerator: Cockcroft and Walton 1935: Scanning electron microscope: Knoll 1937: Xerography: Carlson 1937: Oscilloscope ...
The following articles cover the timeline of United States inventions: Timeline of United States inventions (before 1890), before the turn of the century; Timeline of United States inventions (1890–1945), before World War II; Timeline of United States inventions (1946–1991), during the Cold War; Timeline of United States inventions (after ...
Download as PDF; Printable version ... This section of the timeline of United States history concern events from 1900 to 1929. U.S. territorial extent in 1900. 1900s ...
July 14 – John H. Gear, U.S. Senator from Iowa from 1895 to 1900 (born 1825) August 2 – John Mason Loomis, lumber tycoon, Union militia colonel in the American Civil War and philanthropist (born 1825) August 5 – Luke Pryor, U.S. Senator from Alabama in 1880 (born 1820) August 12 – James Edward Keeler, astronomer (born 1857)
For a timeline of events prior to 1501, see 15th century § Events; For a timeline of events from 1501 to 1600, see 16th century § Significant events; For a timeline of events from 1601 to 1700, see Timeline of the 17th century; For a timeline of events from 1701 to 1800, see Timeline of the 18th century