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From the first Apple computer to the COVID-19 vaccine, here are the most revolutionary inventions that were born in the U.S.A. in the past half-century.
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 ...
Pages in category "20th-century inventions" The following 126 pages are in this category, out of 126 total. This list may not reflect recent changes. A.
2019: The first image of a black hole is captured, using eight different telescopes taking simultaneous pictures, timed with extremely precise atomic clocks. [1] 2020: NASA and SOFIA (Stratospheric Observatory for Infrared Astronomy) discover about 12 US fl oz (350 ml) of surface water in one of the Moon's largest visible craters.
Electrification spread rapidly in the 20th century. At the beginning of the century electric power was for the most part only available to wealthy people in a few major cities. By 2019, an estimated 87 percent of the world's population had access to electricity. [98] Birth control also became widespread during the 20th century.
The 20th century saw mathematics become a major profession. As in most areas of study, the explosion of knowledge in the scientific age has led to specialization: by the end of the century there were hundreds of specialized areas in mathematics and the Mathematics Subject Classification was dozens of pages long. [72]
Commercial HDTV television reached that resolution almost half a century later. The problem of band noise with tape devices is reduced dramatically by the invention of radio frequency bias of Walter Weber and Hans-Joachim von Braunmühl. 1942: The first all-electronic computer is used by John Vincent Atanasoff, but quickly fades into oblivion ...
2 Pre-20th century. 3 20th century. 4 21st century. ... 1999 – Discovery of ... 2010-Over the past two decades, a considerable focus has been directed toward ...