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1 day ago · The history of penicillin follows observations and discoveries of evidence of antibiotic activity of the mould Penicillium that led to the development of penicillins that became the first widely used antibiotics. Following the production of a relatively pure compound in 1942, penicillin was the first naturally-derived antibiotic.
1 day ago · Public health is "the science and art of preventing disease, prolonging life and promoting health through the organized efforts and informed choices of society, organizations, public and private, communities and individuals". [1] [2] Analyzing the determinants of health of a population and the threats it faces is the basis for public health. [3]
2 hours ago · Infanticide (or infant homicide) is the intentional killing of infants or offspring. Infanticide was a widespread practice throughout human history that was mainly used to dispose of unwanted children, [1] : 61 its main purpose being the prevention of resources being spent on weak or disabled offspring.
1 day ago · The history of the Internet has its origin in the efforts of scientists and engineers to build and interconnect computer networks.The Internet Protocol Suite, the set of rules used to communicate between networks and devices on the Internet, arose from research and development in the United States and involved international collaboration, particularly with researchers in the United Kingdom and ...
1 day ago · The roses are sold in Japan, the United States, and Canada. [155] [156] Other genetically modified ornamentals include Chrysanthemum and Petunia . [152] As well as increasing aesthetic value there are plans to develop ornamentals that use less water or are resistant to the cold, which would allow them to be grown outside their natural environments.
1 day ago · Map of military operations since 1950. 1950–1953: Korean War: The United States responded to the North Korean invasion of South Korea by going to its assistance, pursuant to United Nations Security Council resolutions. U.S. forces deployed in Korea exceeded 300,000 during the last year of the active conflict (1953).
1 day ago · Rock is a broad genre of popular music that originated as " rock and roll " in the United States in the late 1940s and early 1950s, developing into a range of different styles from the mid-1960s, particularly in the United States and the United Kingdom. [3] It has its roots in 1940s and 1950s rock and roll, a style that drew directly from the ...
