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Hilbert's tenth problem is the tenth on the list of mathematical problems that the German mathematician David Hilbert posed in 1900. It is the challenge to provide a general algorithm which, for any given Diophantine equation (a polynomial equation with integer coefficients and a finite number of unknowns) can decide whether the equation has a ...
Marie Curie (1867–1934), pioneering research into radioactivity. Women inventors have been historically rare in some geographic regions. For example, in the UK, only 33 of 4090 patents (less than 1%) issued between 1617 and 1816 named a female inventor. [1]
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 ...
As a result, the United States has been the birthplace of 161 of Encyclopædia Britannica ' s 321 Greatest Inventions, including items such as the airplane, internet, microchip, laser, cellphone, refrigerator, email, microwave, personal computer, liquid-crystal display and light-emitting diode technology, air conditioning, assembly line ...
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
Public Domain. In the 1930's, Nikola Tesla, who is known for creating the induction motor and refining AC currents, imagined a machine that would allow you to project a mental image in real life ...
The 1900s saw the decade herald a series of inventions, including the automobile, airplane and radio broadcasting. 1914 saw the completion of the Panama Canal. From 1914 to 1918, the First World War, and its aftermath, caused major changes in the power balance of the world, destroying or transforming some of the most powerful empires.
1891 – A technique of unfreezing time in still images was invented by Claude Monet, who painted the same subject at many different times during the day, showing how it appeared differently largely due to the change in natural light. He painted the cathedral at Rouen at 40 different times of the day, and he painted the same haystack at 20 ...