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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 ...
On September 16, 1930, Lehberger was issued U.S. patent #1,775,861. [232] 1930 Car audio. Car audio/video (car AV) is a sound or video system fitted in an automobile. In 1930, the Galvin Corporation introduced the first commercial car radio, the Motorola model 5T71, which sold for between $110 and $130 and could be installed in most popular ...
1930: Subrahmanyan Chandrasekhar discovers his eponymous limit of the maximum mass of a white dwarf star; 1931: Kurt Gödel: incompleteness theorems prove formal axiomatic systems are incomplete; 1932: James Chadwick: Discovery of the neutron; 1932: Karl Guthe Jansky discovers the first astronomical radio source, Sagittarius A
March 4, 1925 – President Coolidge begins full term, Dawes becomes the 30th vice president 1925 – Scopes Trial , whose outcome found that the teaching of evolution in the classroom "does not violate church and state or state religion laws but instead, merely prohibits the teaching of evolution on the grounds of intellectual disagreement"
March 5 – Danish painter Einar Wegener begins to undergo sexual reassignment surgery in Germany and takes the name Lili Elbe.; July 10 – Mental Treatment Act 1930 in the United Kingdom provides for free voluntary treatment for psychiatric conditions and for psychiatric outpatient clinics, replaces the term "asylum" with "mental hospital" and reorganises the Board of Control for Lunacy and ...
The AOL.com video experience serves up the best video content from AOL and around the web, curating informative and entertaining snackable videos.
1930 – The Great Depression in the United States continues to worsen, reaching a nadir in early 1933. 1930 – The Motion Picture Production Code becomes set of industry censorship guidelines governing production of the vast majority of United States motion pictures released by major studios; is effective for 38 years
The British physicist Dennis Gabor (1900–1979) invents holography. This method of recording and reproducing image with coherent light allows three-dimensional images. It was not until 1971 when the procedure gained practical importance, he received the Nobel Prize for Physics. 1949 In Germany, FM broadcasting starts regular program operation.