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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 ...
2 Pre-20th century. 3 20th century. ... 1999 – Discovery of ... It can be mass-produced and stored for up to two years, unlike donated human corneas that are scarce ...
3rd century BC: Archimedes relates problems in geometric series to those in arithmetic series, foreshadowing the logarithm. [46] 3rd century BC: Pingala in Mauryan India studies binary numbers, making him the first to study the radix (numerical base) in history. [47] 3rd century BC: Pingala in Mauryan India describes the Fibonacci sequence. [48 ...
The past half-century has produced some of the most significant and astounding inventions ever developed in human history, and many notable ones came to life in the United States.
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.
The structure of DNA was determined in 1953 by James Watson, [3] [4] Francis Crick, [3] [4] Rosalind Franklin [4] and Maurice Wilkins, [3] [4] following by developing techniques which allow to read DNA sequences and culminating in starting the Human Genome Project (not finished in the 20th century) and cloning the first mammal in 1996.
Thus the country swarms with medical practitioners, some undertaking to cure diseases of the eye, others of the head, others again of the teeth, others of the intestines, and some those which are not local. [5] 496 – 405 BC – Sophocles "It is not a learned physician who sings incantations over pains which should be cured by cutting." [11]
Who: Frank Epperson, 11-year-old boy. When: 1905. How it was created: When soda pop first hit the market, 11-year-old Frank Epperson decided to save money and make his own. He combined powder and ...