Conel Hugh O'Donel Alexander, CMG, CBE (19 April 1909 – 15 February 1974), was an Irish-born British cryptanalyst, chess player, and chess writer. He worked on the German Enigma machine at Bletchley Park during WWII, and was later the head of the cryptanalysis division at GCHQ for over 20 years. In chess, he was twice British chess champion and earned the title of International Master. He was usually referred to as Hugh Alexander in person.
The United States banned postal chess during WWII because it feared the game was being used to send secret messages.
Conel Hugh O'Donel Alexander by By Olena Kulakovska
Walter Houser Brattain (February 1902 – October was an American physicist at Bell Labs who, along with John Bardeen and William Shockley, invented the transistor. They shared the 1956 Nobel Prize in Physics for their invention.
Physicist Wilhelm Röntgen, born March detected wavelength electromagnetic radiation, resulting in the discovery of x-rays, or Rontgen rays as we used to say.
Galileo was Italian natural philosopher, astronomer, and mathematician who made fundamental contributions to the sciences of motion, astronomy, and strength of materials and to the development of the scientific method.
Henry Moseley: found that atoms of an element contain a unique, positive charge in the atomic nucleus. Concept of atomic number was formed: number of protons in the nucleus of the atom.
Joseph John Thomson gives the first experimental proof of the electron, which had been already theoretically predicted.
Nikola Tesla with one of his famous "wireless" lamps. Published on the cover of the Electrical Experimenter in
La concepción del Universo explicada por 4 filósofos
Biography of Sir Isaac Newton. Life of Sir Isaac Newton. Inventions , life and personal , scientific life of Sir Isaac Newton.
Maria Goeppert Mayer: German-born American physicist who shared one-half of the 1963 Nobel Prize for Physics with J. Hans D. Jensen of West Germany for their proposal of the shell nuclear model.
Josefa Molera, (Navarra, 1921) Doctora en Química y profesora de investigación del CSIC en el Instituto Rocasolano de Física y Química. Se la considera responsable de la introducción en España de los métodos de análisis de las reacciones químicas por cromatografía gas-líquido, le otorgaron el Premio Pekín-Elmer Hispania (1967), por un trabajo de combinación de hasta cuatro columnas cromatográficas.
James Franck, The Nobel Prize in Physics "for their discovery of the laws governing the impact of an electron upon an atom", atomic physics