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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 ...
Back in the 1950s and 1960s, full body workouts were the normal way to train, and bodybuilders such as John Grimek (1940-41 Mr. America), Steve Reeves (Mr. America of 1947, Mr. World of 1948, and Mr. Universe of 1950), George Eiferman (Mr. America of 1948, and Mr. Universe of 1962), Armand Tanny, Reg Park (Mr. Universe of 1951, 1958, and 1965 ...
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]
20th-century percussion instruments (21 P) Pages in category "20th-century inventions" ... Dual-ported video RAM; DVD player;
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.
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.
2010-Over the past two decades, a considerable focus has been directed toward creating sustainable alternatives for petroleum-based fuels, chemicals, and materials. Major players in the chemical industry, such as BASF, DSM, BP, and Total, have initiated significant projects and collaborations in metabolic engineering.
1893 – Wilhelm Wien: Wien's displacement law for black-body radiation; 1895 – Wilhelm Röntgen: X-rays; 1896 – Henri Becquerel: Radioactivity; 1896 – Pieter Zeeman: Zeeman effect; 1897 – J. J. Thomson: Electron discovered; 1900 – Max Planck: Formula for black-body radiation – the quanta solution to radiation ultraviolet catastrophe