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Major Mike

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1953

Today in History 02/28/18

February 28, 2018 by GµårÐïåñ
James Watson and Francis Crick, 1959 (© Bettmann/Corbis)(1953) Watson and Crick reveal DNA discovery
Cambridge University scientists James Watson and Francis Crick announce that they’ve uncovered the double-helix structure of the DNA molecule, helping to unlock the genetic code of humans and other living things. Their breakthrough drew on the pioneering work by their former colleague, Rosalind Franklin, who had produced X-ray diffraction images of DNA, but Franklin’s contribution to the discovery of the DNA double helix will go largely unrecognized during her lifetime.
Deoxyribonucleic acid is a thread-like chain of nucleotides carrying the genetic instructions used in the growth, development, functioning and reproduction of all known living organisms and many viruses. DNA and ribonucleic acid are nucleic acids; alongside proteins, lipids and complex carbohydrates, they are one of the four major types of macromolecules that are essential for all known forms of life. Most DNA molecules consist of two biopolymer strands coiled around each other to form a double helix.
DNA Structure+Key+Labelled
The structure of the DNA double helix. The atoms in the structure are colour-coded by element and the detailed structures of two base pairs are shown in the bottom right.
wiki/DNA
4.8.d17

Posted in: History Tagged: 1953, history

Today in History 01/07/18

January 7, 2018 by GµårÐïåñ
Mushroom cloud produced by the first explosion by the Americans of a hydrogen bomb at Eniwetok Atoll in the South Pacific, 1952 (© SSPL/Getty Images)(1953) Truman announces the H-bomb
In his final State of the Union address, President Harry Truman reveals that the US has created the hydrogen bomb, a thermonuclear weapon vastly more powerful than the atomic bombs dropped on Japan.
A thermonuclear weapon is a second-generation nuclear weapon design using a secondary nuclear fusion stage consisting of implosion tamper, fusion fuel, and spark plug which is bombarded by the energy released by the detonation of a primary fission bomb within, compressing the fuel material and causing a fusion reaction. Some advanced designs use fast neutrons produced by this second stage to ignite a third fast fission or fusion stage. The fission bomb and fusion fuel are placed near each other in a special radiation-reflecting container called a radiation case that is designed to contain x-rays for as long as possible. The result is greatly increased explosive power when compared to single-stage fission weapons. The device is colloquially referred to as a hydrogen bomb or, an H-bomb, because it employs the fusion of isotopes of hydrogen.
Inventor: Edward Teller

Operation Castle - Romeo
Castle Romeo nuclear test (yield 11 Mt) on Bikini Atoll. It was the first nuclear test conducted on a barge. The barge was located in the Castle Bravo crater.
wiki/Thermonuclear_weapon
4.8.d17

Posted in: History Tagged: 1953, history
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