Stereoscopy. Pocket stereoscope with original test image.
Used by military to examine stereoscopic pairs of aerial photographs. View of Boston, c. 1860; an early stereoscopic card for viewing a scene from nature Kaiserpanorama consisted of a multi-station viewing apparatus and sets of stereo slides. Patented by A. Lord Byron. He travelled all over Europe especially in Italy where he lived for seven years and then joined the Greek War of Independence fighting the Ottoman Empire, for which Greeks revere him as a national hero. He died one year later at age 36 from a fever contracted while in Missolonghi in Greece.
Often described as the most flamboyant and notorious of the major Romantics, Byron was celebrated in life for aristocratic excesses, including huge debts, numerous love affairs with both sexes, rumours of a scandalous incestuous liaison with his half-sister, and self-imposed exile. Early life Byron's paternal grandparents were Vice-Admiral the Hon. General relativity. General relativity, or the general theory of relativity, is the geometric theory of gravitation published by Albert Einstein in 1916 and the current description of gravitation in modern physics.
General relativity generalizes special relativity and Newton's law of universal gravitation, providing a unified description of gravity as a geometric property of space and time, or spacetime. In particular, the curvature of spacetime is directly related to the energy and momentum of whatever matter and radiation are present. The relation is specified by the Einstein field equations, a system of partial differential equations.
Chaos theory. A double rod pendulum animation showing chaotic behavior.
Starting the pendulum from a slightly different initial condition would result in a completely different trajectory. The double rod pendulum is one of the simplest dynamical systems that has chaotic solutions. Chaos: When the present determines the future, but the approximate present does not approximately determine the future. Schrödinger's cat. Schrödinger's cat: a cat, a flask of poison, and a radioactive source are placed in a sealed box.
If an internal monitor detects radioactivity (i.e. a single atom decaying), the flask is shattered, releasing the poison that kills the cat. The Copenhagen interpretation of quantum mechanics implies that after a while, the cat is simultaneously alive and dead. Yet, when one looks in the box, one sees the cat either alive or dead, not both alive and dead. This poses the question of when exactly quantum superposition ends and reality collapses into one possibility or the other. Schrödinger's cat is a thought experiment, sometimes described as a paradox, devised by Austrian physicist Erwin Schrödinger in 1935. Bohr–Einstein debates. The Bohr–Einstein debates were a series of public disputes about quantum mechanics between Albert Einstein and Niels Bohr, who were two of its founders.
Their debates are remembered because of their importance to the philosophy of science. An account of the debates has been written by Bohr in an article titled "Discussions with Einstein on Epistemological Problems in Atomic Physics". Despite their differences of opinion regarding quantum mechanics, Bohr and Einstein had a mutual admiration that was to last the rest of their lives.
Rapid eye movement sleep. Rapid eye movement (REM) sleep is a stage of sleep characterized by the rapid and random movement of the eyes.
Rapid eye movement sleep is classified into two categories: tonic and phasic. It was identified and defined by Nathaniel Kleitman and his student Eugene Aserinsky in 1953. Criteria for REM sleep includes rapid eye movement, low muscle tone and a rapid, low-voltage EEG; these features are easily discernible in a polysomnogram, the sleep study typically done for patients with suspected sleep disorders. Richard Wagner. Wilhelm Richard Wagner (/ˈvɑːɡnər/; German: [ˈʁiçaʁt ˈvaːɡnɐ]; 22 May 1813 – 13 February 1883) was a German composer, theatre director, polemicist, and conductor who is primarily known for his operas (or, as some of his later works were later known, "music dramas").
Unlike most opera composers, Wagner wrote both the libretto and the music for each of his stage works. Initially establishing his reputation as a composer of works in the romantic vein of Weber and Meyerbeer, Wagner revolutionised opera through his concept of the Gesamtkunstwerk ("total work of art"), by which he sought to synthesise the poetic, visual, musical and dramatic arts, with music subsidiary to drama, and which was announced in a series of essays between 1849 and 1852.
Wagner realised these ideas most fully in the first half of the four-opera cycle Der Ring des Nibelungen (The Ring of the Nibelung). Wagner had his own opera house built, the Bayreuth Festspielhaus, which embodied many novel design features. The Holocaust. The Holocaust (from the Greek ὁλόκαυστος holókaustos: hólos, "whole" and kaustós, "burnt") also known as Shoah (Hebrew: השואה, HaShoah, "the catastrophe"; Yiddish: חורבן, Churben or Hurban, from the Hebrew for "destruction"), was the mass murder or genocide of approximately six million Jews during World War II, a programme of systematic state-sponsored murder by Nazi Germany, led by Adolf Hitler and the Nazi Party, throughout the German Reich and German-occupied territories. Of the nine million Jews who had resided in Europe before the Holocaust, approximately two-thirds were killed. Over one million Jewish children were killed in the Holocaust, as were approximately two million Jewish women and three million Jewish men. A network of over 40,000 facilities in Germany and German-occupied territory were used to concentrate, hold, and kill Jews and other victims.
Tsar Bomba. Coordinates: 73°48′26″N 54°58′54″E / 73.80722°N 54.98167°E / 73.80722; 54.98167 Tsar Bomba (Russian: Царь-бомба; "Tsar Bomb", "Emperor Bomb", Tsar being derived from Caesar) is the nickname for the AN602 hydrogen bomb, the most powerful nuclear weapon ever detonated.
Its October 30, 1961 test remains the most powerful artificial explosion in human history. It was also referred to as Kuz'kina Mat' (Russian: Кузькина мать, Kuzka's mother), referring to Nikita Khrushchev's promise to show the United States a "Kuz'kina Mat'" at the 1960 United Nations General Assembly. The famous Russian idiom, which has been problematic for translators, literally meaning “to show somebody Kuzka's mother”, equates roughly with the English “We’ll show you!”
History of technology. The wheel was invented in the 4th millennium BC, and has become one of the world's most famous, and most useful technologies. This wheel is on display in The National Museum of Iran, in Tehran. The history of technology is the history of the invention of tools and techniques, and is similar in many ways to the history of humanity. Background knowledge has enabled people to create new things, and conversely, many scientific endeavors have become possible through technologies which assist humans to travel to places we could not otherwise go, and probe the nature of the universe in more detail than our natural senses allow.
Indo-European languages. The Indo-European languages are a family of several hundred related languages and dialects. There are about 439 languages and dialects, according to the 2009 Ethnologue estimate, about half (221) belonging to the Indo-Aryan subbranch. It includes most major current languages of Europe, the Iranian plateau, and the Indian Subcontinent, and was also predominant in ancient Anatolia. With written attestations appearing since the Bronze Age in the form of the Anatolian languages and Mycenaean Greek, the Indo-European family is significant to the field of historical linguistics as possessing the second-longest recorded history, after the Afro-Asiatic family. Time Person of the Year. History The tradition of selecting a "Man of the Year" began in 1927, with Time editors contemplating news makers of the year.
The idea was also an attempt to remedy the editorial embarrassment earlier that year of not having aviator Charles Lindbergh on its cover following his historic trans-Atlantic flight. By the end of the year, it was decided that a cover story featuring Lindbergh as the Man of the Year would serve both purposes.[volume & issue needed] Since then, individual people, classes of people, the computer ("Machine of the Year" in 1982), and "Endangered Earth" ("Planet of the Year" in 1988) have all been selected for the special year-end issue.
Leviathan (book) Leviathan or The Matter, Forme and Power of a Common Wealth Ecclesiasticall and Civil — commonly referred to as Leviathan — is a book written by Thomas Hobbes (1588–1679) and published in 1651. Its name derives from the biblical Leviathan. The work concerns the structure of society and legitimate government, and is regarded as one of the earliest and most influential examples of social contract theory. Leviathan ranks as a classic western work on statecraft comparable to Machiavelli's The Prince.
Written during the English Civil War (1642–1651), Leviathan argues for a social contract and rule by an absolute sovereign. Hobbes wrote that civil war and the brute situation of a state of nature ("the war of all against all") could only be avoided by strong undivided government. After lengthy discussion with Hobbes, the Parisian Abraham Bosse created the etching for the book's famous frontispiece in the géometrique style which Bosse himself had refined. English Civil War. The English Civil War (1642–1651) was a series of armed conflicts and political machinations between Parliamentarians ("Roundheads") and Royalists ("Cavaliers") in the Kingdom of England over, principally, the manner of its government.
The first (1642–46) and second (1648–49) wars pitted the supporters of King Charles I against the supporters of the Long Parliament, while the third (1649–51) saw fighting between supporters of King Charles II and supporters of the Rump Parliament. The war ended with the Parliamentarian victory at the Battle of Worcester on 3 September 1651.
The overall outcome of the war was threefold: the trial and execution of Charles I; the exile of his son, Charles II; and the replacement of English monarchy with, at first, the Commonwealth of England (1649–53) and then the Protectorate (1653–59) under Oliver Cromwell's personal rule. Ralph Waldo Emerson. Guy Fawkes. Low Countries. Czechoslovakia. Austria-Hungary. Austrian Empire. Mach number. Northrop Grumman B-2 Spirit.