The book is a chronology of the development of the theory of Relativity. Starting with Lorentz' papers on Michelson's interference experiment and electomagnetic phenomena in moving frames of reference, the book follows the rapid development...

In physics, mass–energy equivalence is a concept formulated by Albert Einstein that explains the relationship between mass and energy. It expresses the law of equivalence of energy and mass using the formula E = mc2 where E is the ene...

The Revolution of 1905 was a wave of mass political and social unrest that spread through vast areas of the Russian Empire. Some of it was directed against the government, while some was undirected. It included worker strikes, peasant unres...

Astrid of Sweden was the Queen consort of King Leopold III of the Belgians. She was the third daughter of Prince Carl, Duke of Westrogothia, and his wife Princess Ingeborg of Denmark. She married Leopold on November 4, 1926, and became Q...

Kuiper is considered to be the father of modern planetary science for his wide ranging studies of the solar system. Although he contributed to astrophysics, established the atmosphere of Saturn's moon Titan, and discovered Saturn's moon Mir...

Howard Robard Hughes, Jr. was an American business tycoon, investor, aviator, aerospace engineer, inventor, filmmaker and philanthropist. He was one of the wealthiest people in the world. As a maverick film tycoon, Hughes gained prominence...

Jean-Paul Charles Aymard Sartre was a French philosopher, playwright, novelist, screenwriter, political activist, biographer, and literary critic. He was one of the key figures in the philosophy of existentialism and phenomenology, and one...

Albert Speer was a German architect who was, for part of World War II, Minister of Armaments and War Production for the Third Reich. Speer was Adolf Hitler's chief architect before assuming ministerial office. As "the Nazi who said sorry",...

Viktor Emil Frankl was an Austrian neurologist and psychiatrist as well as a Holocaust survivor. Frankl was the founder of logotherapy, which is a form of Existential Analysis, the "Third Viennese School of Psychotherapy". His best-selling...

Thomas "Tommy" Harold Flowers was an English engineer. During World War II, Flowers designed Colossus, the world's first programmable electronic computer, to help solve encrypted German messages. Flowers's first contact with the wartime...

Max Schmeling was a German boxer who was heavyweight champion of the world between 1930 and 1932. His two fights with Joe Louis in the late 1930s transcended boxing and became worldwide social events because of their national associations....

The San Francisco earthquake of 1906 was a major earthquake that struck San Francisco and the coast of northern California at 5:12am on Wednesday, April 18, 1906. The most widely accepted estimate for the magnitude of the earthquake is a mo...

The Benjamin Franklin Medal presented by the American Philosophical Society located in Philadelphia, Pennsylvania, U.S.A., also called Benjamin Franklin Bicentennial Medal, is awarded since 1906. The originally called "Philosophical Society...

Ettore Majorana (missing, presumed dead on 27 March 1938) was an Italian theoretical physicist who began work on neutrino masses. He disappeared suddenly in mysterious circumstances. The Majorana equation and Majorana fermions are named aft...

Aisin-Gioro Puyi was the Xuantong Emperor of China between 1908 and 1924 (ruling emperor between 1908 and 1912, and non-ruling emperor between 1912 and 1924), the tenth (and last) emperor of the Manchu Qing Dynasty to rule over China. Later...