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Inventor. Folding "cabinet-bed", forerunner of the Murphy bed; first African-American woman to receive a patent in the United States. [81][82][83] Grant, George F. 1846–1910. Dentist, professor. The first African-American professor at Harvard, Boston dentist, and inventor of a wooden golf tee.
e. The one-drop rule was a legal principle of racial classification that was prominent in the 20th-century United States. It asserted that any person with even one ancestor of black ancestry ("one drop" of "black blood") [1][2] is considered black (Negro or colored in historical terms). It is an example of hypodescent, the automatic assignment ...
African Americans. This list of historically black colleges and universities (HBCUs) includes institutions of higher education in the United States that were established before 1964 with the intention of primarily serving the Black American community. [1][2] Most HBCU's are located in the Southern United States, where state laws generally ...
The 1999 final poll produced an ordered list of 18 people, 12 of whom were males and 12 of whom were American citizens; the highest ranked non-American and non-male was (Saint) Mother Teresa, at #1. As of 2024, at 78, Bill Clinton is the only surviving person on the list. Previously, Ronald Reagan, John Paul II, Margaret Thatcher, Nelson ...
The Great Migration throughout the 20th century (starting from World War I) [5] [6] resulted in more than six million African Americans leaving the Southern U.S. (especially rural areas) and moving to other parts of the United States (especially to urban areas) due to the greater economic/job opportunities, less anti-black violence/lynchings ...
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Gersh Budker (1918–1977), Russia – electron cooling, co-inventor of collider. Edward Bull (1759–1798), England – Bull engine (a modified steam engine) Robert Bunsen (1811–1899), Germany – Bunsen burner. Henry Burden (1791–1871), Scotland and U.S. – Horseshoe machine, first usable iron railroad spike.
The 20th century began on 1 January 1901 (MCMI), and ended on 31 December 2000 (MM). [1][2] It was the 10th and last century of the 2nd millennium and was marked by new models of scientific understanding, unprecedented scopes of warfare, new modes of communication that would operate at nearly instant speeds, and new forms of art and entertainment.