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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 ...
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]
Image credits: Isabella Thornton #2 An Early Motorised Scooter. The Autoped was an early vision of today's scooters. This was a personal transport system originally developed in 1915.
But it was not until 1929 that Earle Haas of Denver first invented the modern tampon with an applicator. Dr. Haas submitted the design for patent in 1931, and in 1936, the tampon was first sold in the United States. He later gave his invention the brandname Tampax, which is still one of the main tampon brands today. [225] [226] 1929 Eyelash curler
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.
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 ...
220–150 BCE – Apollonius: and Hipparchus: Invention of Astrolabe; 205–86 BCE – Hipparchus or unknown: Antikythera mechanism an analog computer of planetary motions; 129 BCE – Hipparchus: Hipparchus star catalog of the entire sky [5] and precession of the equinoxes