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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 ...
A timeline of United States inventions (1890–1945) encompasses the innovative advancements of the United States within a historical context, dating from the Progressive Era to the end of World War II, which have been achieved by inventors who are either native-born or naturalized citizens of the United States.
The age of Imperial Karnataka was a period of significant advancement in Indian mathematics. The Golden Age of Indian mathematics and astronomy continues after the end of the Gupta empire, especially in Southern India during the era of the Rashtrakuta , Western Chalukya and Vijayanagara empires of Karnataka , which variously patronised Hindu ...
American researchers made fundamental advances in telecommunications and information technology. For example, AT&T 's Bell Laboratories spearheaded the American technological revolution with a series of inventions including the light emitting diode ( LED ), the transistor , the C programming language , and the UNIX computer operating system.
Significant advances were also made in military technology with the development of plate armour, steel crossbows and cannon. The Middle Ages are perhaps best known for their architectural heritage: While the invention of the rib vault and pointed arch gave rise to the high rising Gothic style , the ubiquitous medieval fortifications gave the ...
A timeline of United States inventions (after 1991) encompasses the ingenuity and innovative advancements of the United States within a historical context, dating from the Contemporary era to the present day, which have been achieved by inventors who are either native-born or naturalized citizens of the United States.
The next advancement in the gridiron was a steel wire one was invented and patented in 1889 in New Haven, Connecticut, by William C. Perkins, of the New Haven Wire Goods Company, who received U.S. Patent #408,136 on July 30, 1889, for a hinged gridiron that would hold the meat in place while broiling. [78] 1836 Circuit breaker
Technology inflows from abroad have played an important role in the development of the United States, especially in the late nineteenth century. A favorable US security environment that allowed relatively low defense spending. High trade barriers encouraged the development of domestic manufacturing industries and the inflow of foreign technologies.