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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 ...
Pages in category "20th-century inventions" ... Zoo key This page was last edited on 22 November 2023, at 19:18 (UTC). Text is available under the Creative ...
10th century – sea-going junk ships built in China. Late 10th century – Kamal invented in Arab world. 1044 – Compass invented in China. 13th century (or before) – Rocket missiles used in China. Rocket powered passenger vehicles did not appear until 1939. 1350 – Compass dial invented by Ibn al-Shatir. 1479–1519 – Da Vinci sketches ...
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.
May 31: Establishment of 20th Century Fox. March 21: Reza Shah of Iran asks the international community to formally adopt the name "Iran" to refer to the country, instead of the name "Persia". June 12: Chaco War ends. September 15: Enactment of the Nuremberg racial laws. October 3: The Second Italo-Ethiopian War begins and goes until February 1937.
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 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]
3rd century BC: Archimedes uses the method of exhaustion to construct a strict inequality bounding the value of π within an interval of 0.002. 3rd century BC: Archimedes develops the field of statics, introducing notions such as the center of gravity, mechanical equilibrium, the study of levers, and hydrostatics.