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20th; 21st; 22nd; 23rd; 24th; 25th; 26th; Subcategories. This category has only the following subcategory. ... Pages in category "21st-century inventions" The ...
20th; 21st; 22nd; 23rd; 24th; 25th; ... Pages in category "20th-century inventions" The following 128 pages are in this category, out of 128 total. ... World Wide Web;
The 20th century changed the world in unprecedented ways. The World Wars sparked tension between countries and led to the creation of atomic bombs, the Cold War led to the Space Race and the creation of space-based rockets, and the World Wide Web was created.
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 ...
The increase of 25% CO2 expected by the end of the century therefore corresponds to an increase of 0.6°C in the world temperature – an amount somewhat greater than the climatic variation of recent centuries. – John Sawyer, 1972. The mainstream news media at the time exaggerated the warnings of the minority who expected imminent cooling.
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 ...
Public Domain. Henry Ford is known for many things — the most prominent being mass-manufactured cars and paying workers respectable wages. But his first automobile, made in 1896, was powered by ...