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Pages in category "20th-century inventions" The following 128 pages are in this category, out of 128 total. This list may not reflect recent changes. A.
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 ...
Yep, people back then would insert a coin and receive just the right amount of holy water from temples in Egypt.While the vending machine might seem like a fairly modern invention, it’s actually ...
5. Play-Doh. Who: Kay Zufall, Brian, Joseph McVicker, Bill Rhodenbaugh When: 1956 . How it was created: The gooey toy kids have been playing with for decades began as a household cleaning product ...
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.
Hot comb The hot comb was an invention developed in France as a way for women with coarse curly hair to achieve a fine straight look traditionally modeled by historical Egyptian women. [44] However, it was Annie Malone who first patented this tool, while her protégé and former worker, Madam C. J. Walker, widened the teeth. [45]
Scroll through for 40 photos of celebrities working, playing, and living it up at age 21. Jack Nicholson (1958) Nicholson poses for a publicity still for his debut film, The Cry Baby Killer .
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]