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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 modern-day provisions of the law applied to inventions are laid out in Title 35 of the United States Code (Ch. 950, sec. 1, 66 Stat. 792). From 1836 to 2011, the United States Patent and Trademark Office (USPTO) has granted a total of 7,861,317 patents [7] relating to several well-known inventions appearing throughout the timeline below.
Also, by the end of the 20th century, uncrewed probes had visited the Moon, Mercury, Venus, Mars, Jupiter, Saturn, Uranus, Neptune, and various asteroids and comets. The Hubble Space Telescope , launched in 1990, greatly expanded our understanding of the Universe and brought brilliant images to TV and computer screens around the world.
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 following articles cover the timeline of United States inventions: Timeline of United States inventions (before 1890), before the turn of the century; Timeline of United States inventions (1890–1945), before World War II; Timeline of United States inventions (1946–1991), during the Cold War
Out of the chemicals listed by the US Department of Energy, only lactic acid and itaconic acid have achieved industrial-scale production. Lactic acid, added to the list in 2010 after large-scale production was established, currently holds a market value exceeding US$2.5 billion, primarily used in the production of polylactate. [5]
4th century BC: The first true formal system is constructed by Pāṇini in his Sanskrit grammar. [34] [35] 4th century BC: Eudoxus of Cnidus states the Archimedean property. [36] 4th century BC: Thaetetus shows that square roots are either integer or irrational. 4th century BC: Thaetetus enumerates the Platonic solids, an early work in graph ...
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 ...