Diamond is a solid form of the element carbon with its atoms arranged in a crystal structure called diamond cubic. Diamond as a form of carbon is tasteless, odourless, strong, brittle solid, colourless in pure form, a poor conductor of electricity, and insoluble in water. Another solid form of carbon known as graphite is the chemically stable form of carbon at room temperature and pressure, but diamond is metastable and converts to it at a negligible rate under those conditions. Diamond has the highest hardness and thermal conductivity of any natural material, properties that are used in major industrial applications such as cutting and polishing tools. They are also the reason that diamond anvil cells can subject materials to pressures found deep in the Earth.
Because the arrangement of atoms in diamond is extremely rigid, few types of impurity can contaminate it (two exceptions are boron and nitrogen). Small numbers of defects or impurities (about one per million of lattice atoms) can color a diamond blue (boron), yellow (nitrogen), brown (defects), green (radiation exposure), purple, pink, orange, or red. Diamond also has a very high refractive index and a relatively high optical dispersion. (Full article...)
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Soviet and German deployments near Prokhorovka on the eve of the engagement of 12 July. Positions of the II SS-Panzer Corps are in blue; the red dashed line shows the position of Soviet forces directly opposing the SS-Panzer Corps. The black dashed line is the railway running from Prokhorovka southwest through the Psel corridor (the strip of land between the Psel River and a tributary of the Northern Donets River).
In April 1943, the German leadership began preparing for Operation Citadel, with the objective of enveloping and destroying the Soviet forces in the Kursk salient by attacking and breaking through the base of the salient from north and south simultaneously. The German offensive was delayed several times because of the vacillation of the leadership (Hitler repeatedly delayed launching the attack so that more Tiger tanks could be delivered to the front, hoping that a technical advantage would help him win the offensive) and the addition of more forces and new equipment. The Soviet high command, Stavka, had learned of the German intentions and so used the delay to prepare a series of defensive belts along the routes of the planned German offensive. The Soviet leadership also massed several armies deep behind their defences as the Stavka Reserve. The army group, the Steppe Front, was to launch counteroffensives once the German strength had dissipated. The 5th Guards Tank Army was the primary armoured formation of the Steppe Front. (Full article...)
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Fram leaves Bergen on 2 July 1893, bound for the Arctic Ocean Nansen's Fram expedition of 1893–1896 was an attempt by the Norwegian explorer Fridtjof Nansen to reach the geographical North Pole by harnessing the natural east–west current of the Arctic Ocean. In the face of much discouragement from other polar explorers, Nansen took his ship Fram to the New Siberian Islands in the eastern Arctic Ocean, froze her into the pack ice, and waited for the drift to carry her towards the pole. Impatient with the slow speed and erratic character of the drift, after 18 months Nansen and a chosen companion, Hjalmar Johansen, left the ship with a team of Samoyed dogs and sledges and made for the pole. They did not reach it, but they achieved a record Farthest North latitude of 86°13.6′N before a long retreat over ice and water to reach safety in Franz Josef Land. Meanwhile, Fram continued to drift westward, finally emerging in the North Atlantic Ocean.
The idea for the expedition had arisen after items from the American vessel Jeannette, which had sunk off the north coast of Siberia in 1881, were discovered three years later off the south-west coast of Greenland. The wreckage had obviously been carried across the polar ocean, perhaps across the pole itself. Based on this and other debris recovered from the Greenland coast, the meteorologist Henrik Mohn developed a theory of transpolar drift, which led Nansen to believe that a specially designed ship could be frozen in the pack ice and follow the same track as Jeannette wreckage, thus reaching the vicinity of the pole. (Full article...)
After the mutineers sought asylum in Constanța, Romania, and after the Russians recovered the ship, her name was changed to Panteleimon. She accidentally sank a Russian submarine in 1909 and was badly damaged when she ran aground in 1911. During World War I, Panteleimon participated in the Battle of Cape Sarych in late 1914. She covered several bombardments of the Bosphorus fortifications in early 1915, including one where the ship was attacked by the OttomanbattlecruiserYavuz Sultan Selim – Panteleimon and the other Russian pre-dreadnoughts present drove her off before she could inflict any serious damage. The ship was relegated to secondary roles after Russia's first dreadnought battleship entered service in late 1915. She was by then obsolete and was reduced to reserve in 1918 in Sevastopol. (Full article...)
The construction of the cathedral was approved in 1894 by the Ministry of Internal Affairs of the Russian Empire. Groundbreaking was in 1899; construction work began in 1901 and was completed ten years later. Three-aisled and built from red brick, the cathedral is based on a design by architect Tomasz Bohdanowicz-Dworzecki. The style was influenced by Westminster Abbey and Milan Cathedral. With the help of funds from Catholic parishes in Russia and its neighbouring states, the church was consecrated as a chapel for Moscow's Polish parish in 1911. In the aftermath of the Russian Revolution in 1917, the Provisional Government was overthrown by the Bolsheviks and Russia eventually became part of the Soviet Union in 1922. Because the promotion of state atheism was a part of Marxist–Leninist ideology, the government ordered many churches closed; the cathedral was closed in 1938. During World War II, it was threatened with demolition, and was used after the war for civil purposes, as a warehouse and then a hostel. Following the fall of communism in 1991, it returned to being a church in 1996. In 2002 it was elevated to the status of cathedral. Following an extensive and costly programme of reconstruction and refurbishment, the cathedral was reconsecrated in 2005. (Full article...)
The Gurian Republic was an insurgent community that existed between 1902 and 1906 in the western Georgian region of Guria (known at the time as the Ozurget Uyezd) in the Russian Empire. It rose from a revolt over land grazing rights in 1902. Several issues over the previous decades affecting the peasant population including taxation, land ownership and economic factors also factored into the start of the insurrection. The revolt gained further traction through the efforts of Georgian social democrats, despite some reservations within their party over supporting a peasant movement, and grew further during the 1905 Russian Revolution.
During its existence, the Gurian Republic ignored Russian authority and established its own system of government, which consisted of assemblies of villagers meeting and discussing issues. A unique form of justice, where trial attendees voted on sentences, was introduced. While the movement broke from imperial administration, it was not anti-Russian, desiring to remain within the Empire. (Full article...)
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Tennessine is a synthetic chemical element; it has symbolTs and atomic number 117. It has the second-highest atomic number and joint-highest atomic mass of all known elements and is the penultimate element of the 7th period of the periodic table. It is named after the U.S. state of Tennessee, where key research institutions involved in its discovery are located (however, the IUPAC says that the element is named after the "region of Tennessee").
The discovery of tennessine was officially announced in Dubna, Russia, by a Russian–American collaboration in April 2010, which makes it the most recently discovered element. One of its daughter isotopes was created directly in 2011, partially confirming the results of the experiment. The experiment itself was repeated successfully by the same collaboration in 2012 and by a joint German–American team in May 2014. In December 2015, the Joint Working Party of the International Union of Pure and Applied Chemistry (IUPAC) and the International Union of Pure and Applied Physics (IUPAP), which evaluates claims of discovery of new elements, recognized the element and assigned the priority to the Russian–American team. In June 2016, the IUPAC published a declaration stating that the discoverers had suggested the name tennessine, a name which was officially adopted in November 2016. (Full article...)
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The Norslunda runestone bearing runic inscription U 419, which mentions the personal name Kylfingr The Kylfings (Old NorseKylfingar; EstonianKalevid; HungarianKölpények; Old East Slavic Колбяги, Kolbiagi; Byzantine Greek Κουλπίγγοι, Koulpingoi; Arabical-Kilabiyya) were a people of uncertain origin active in Northern Europe during the Viking Age, roughly from the late ninth century to the early twelfth century. They could be found in areas of Lapland, Russia, and the Byzantine Empire that were frequented by Scandinavian traders, raiders and mercenaries. Scholars differ on whether the Kylfings were ethnically Finnic or Norse. Also disputed is their geographic origin, with Denmark, Sweden and the Eastern Baltic all put forward as candidates. Whether the name Kylfing denotes a particular tribal, socio-political, or economic grouping is also much debated.
Due to the length of the front lines created by the German 1942 summer offensive, which had aimed at taking the Caucasus oil fields and the city of Stalingrad, German and other Axis forces were over-extended. The German decision to transfer several mechanized divisions from the Soviet Union to Western Europe exacerbated their situation. Furthermore, Axis units in the area were depleted by months of fighting, especially those which had taken part in the struggle for Stalingrad. The Germans could only count on the XXXXVIII Panzer Corps, which had the strength of a single panzer division, and the 29th Panzergrenadier Division as reserves to bolster their Romanian allies guarding the German Sixth Army's flanks. These Romanian armies lacked the heavy equipment to deal with Soviet armor. In contrast, the Red Army deployed over one million personnel for the offensive. Soviet troop movements were not without problems: concealing their build-up proved difficult, and Soviet units commonly arrived late due to logistical issues. Operation Uranus was first postponed by the Soviet high command (Stavka) from 8 to 17 November, then to 19 November. (Full article...)
On 6 August 1945, at 8:15 am local time, the United States detonated an atomic bomb over the Japanese city of Hiroshima. Sixteen hours later, American president Harry S. Truman called again for Japan's surrender, warning them to "expect a rain of ruin from the air, the like of which has never been seen on this earth." Late on 8 August 1945, in accordance with the Yalta agreements, but in violation of the Soviet–Japanese Neutrality Pact, the Soviet Union declared war on Japan, and soon after midnight on 9 August 1945, the Soviet Union invaded the Japanese puppet state of Manchukuo. Hours later, the U.S. dropped a second atomic bomb on the Japanese city of Nagasaki. Emperor Hirohito subsequently ordered the Supreme Council for the Direction of the War to accept the terms the Allies had set down in the Potsdam Declaration. After several more days of behind-the-scenes negotiations and a failed coup d'état by hardliners in the Japanese military, Emperor Hirohito gave a recorded radio address across the Empire on 15 August announcing the surrender of Japan to the Allies. (Full article...)
Peresvet and Pobeda were salvaged after the Japanese captured Port Arthur and incorporated into the Imperial Japanese Navy. Peresvet was sold back to the Russians during World War I, as the two countries were by now allies, and sank after hitting German mines in the Mediterranean in early 1917 while Pobeda, renamed Suwo, remained instead in Japanese service and participated in the Battle of Tsingtao in late 1914. She became a gunnery training ship in 1917. The ship was disarmed in 1922 to comply with the terms of the Washington Naval Treaty and probably scrapped around that time. (Full article...)
Although James Clerk Maxwell made the first color photograph in 1861, the results were far from realistic until Prokudin-Gorsky perfected the technique with a series of improvements around 1905. His process used a camera that took a series of monochrome pictures in rapid sequence, each through a different colored filter. Prokudin-Gorskii then went on to document much of the country of Russia, travelling by train in a specially equipped darkroomrailroad car.
The current main building of the Moscow State University in Sparrow Hills, Moscow, Russia. Designed by Lev Rudnev and completed by 1953, the 240-metre (790 ft) tall structure was the tallest building in Europe until the completion of the Messeturm in 1990.
A painting depicting Ivan Tsarevich, one of the main heroes of Russian folklore, riding a magic carpet after having captured the Firebird, which he keeps in a cage. This work was Viktor Vasnetsov's first attempt at illustrating Russian folk tales and inaugurated a famous series of paintings on the themes drawn from Russian folklore.
A late nineteenth-century photochrom of a reindeer sled, Arkhangelsk, Russia. Reindeer have been herded for centuries by several Arctic and Subarctic people including the Sami and the Nenets. They are raised for their meat, hides, antlers and, to a lesser extent, for milk and transportation.
Kombat (Russian for 'battalion commander') is a black-and-white photograph by Soviet photographer Max Alpert. It depicts a Soviet military officer, armed with a TT pistol, raising his unit for an attack during World War II. This work is regarded as one of the most iconic Soviet World War II photographs, yet neither the date nor the subject is known with certainty. According to the most widely accepted version, it depicts junior politruk Aleksei Gordeyevich Yeryomenko, minutes before his death on 12 July 1942, in Voroshilovgrad Oblast, now part of Ukraine. The photograph is in the archives of RIA Novosti, a Russian state-owned news agency.
A female Siberian tiger (Panthera tigris altaica), a subspecies of tiger native to Central Asia, and her cub. The Siberian tiger is the largest of the extant tiger subspecies as well as the largest felid, attaining 320 kg (710 lb) in an exceptional specimen. Considered an endangered subspecies, the wild population is down to several hundred individuals and is limited to eastern Siberia.
Fyodor Dostoevsky (1821–81; depicted in 1872) was a Russian novelist, short story writer, essayist and philosopher. After publishing his first novel, Poor Folk, at age 25, Dostoyevsky wrote (among others) eleven novels, three novellas, and seventeen short novels, including Crime and Punishment (1866), The Idiot (1869), and The Brothers Karamazov (1880).
Photograph credit: Arto Jousi; restored by Adam Cuerden
Yuri Gagarin (9 March 1934 – 27 March 1968) was a Soviet Air Forces pilot and cosmonaut who became the first human to journey into outer space; his capsule, Vostok 1, completed a single orbit of Earth on 12 April 1961. Gagarin became an international celebrity and was awarded many medals and titles, including Hero of the Soviet Union, his nation's highest honour. In 1967, he served as a member of the backup crew for the ill-fated Soyuz 1 mission, after which the Russian authorities, fearing for the safety of such an iconic figure, banned him from further spaceflights. However, he was killed the following year, when the MiG-15 training jet that he was piloting with his flight instructor Vladimir Seryogin crashed near the town of Kirzhach.
This photograph of Gagarin, dated July 1961, was taken at a press conference during a visit to Finland approximately three months after his spaceflight.
Saint Michael's Castle is a former royal residence in the historic centre of Saint Petersburg, Russia. It was built for Emperor Paul I between 1797 and 1801, and named after Saint Michael, the patron saint of the royal family. Constructed like a castle around a small octagonal courtyard, the four facades were built in different architectural styles, including French Classicism, Italian Renaissance and Gothic. The emperor was assassinated in the castle forty days after taking up residence. After his death, the imperial family returned to the Winter Palace and the building was transferred to the Russian Army's Main Engineering School. In 1990, it became a branch of the Russian Museum, and now houses its portrait gallery.
Sadko is a character in the Russian medieval epic Bylina. An adventurer, merchant and gusli musician from Novgorod, Sadko becomes wealthy with the help of the Sea Tsar, but is thrown in the sea when he fails to pay the Sea Tsar his due respects. This story was widely adapted in the 19th century, including in a poem by Alexei Tolstoy and an opera by Nikolai Rimsky-Korsakov.
Shown here is Sadko in the Underwater Kingdom, an 1876 painting by Ilya Repin. It depicts Sadko meeting the Sea Tsar under the sea.
This photograph of Skudina, taken in 2009, is part of a collection of 500 images of Russian sportspeople released to Wikimedia Commons by Bolshoi Sport.
This photo of the Nilov Monastery on Stolobny Island in Tver Oblast, Russia, was taken by Sergey Prokudin-Gorsky in 1910 before the advent of colour photography. His process used a camera that took a series of monochrome pictures in rapid sequence, each through a different coloured filter. By projecting all three monochrome pictures using correctly coloured light, it was possible to reconstruct the original colour scene.
Cheburek (plural: Chebureki) are deep-fried turnovers with a filling of ground or minced meat and onions. A popular street dish, they are made with a single round piece of dough folded over the filling in a crescent shape. They have become widespread in the former Soviet-aligned countries of Eastern Europe in the 20th century.
Rimsky-Korsakov believed in developing a nationalistic style of classical music, as did his fellow composer Mily Balakirev and the critic Vladimir Stasov. This style employed Russian folk song and lore along with exotic harmonic, melodic and rhythmic elements in a practice known as musical orientalism, and eschewed traditional Western compositional methods. Rimsky-Korsakov appreciated Western musical techniques after he became a professor of musical composition, harmony, and orchestration at the Saint Petersburg Conservatory in 1871. He undertook a rigorous three-year program of self-education and became a master of Western methods, incorporating them alongside the influences of Mikhail Glinka and fellow members of The Five. Rimsky-Korsakov's techniques of composition and orchestration were further enriched by his exposure to the works of Richard Wagner. (Full article...)
... that Ivan Beshoff, the last survivor of the mutiny on the Potemkin, emigrated to Ireland where he established a fish and chip shop that is still run by his descendants?
In my view, the composer, just as the poet, the sculptor or the painter, is in duty bound to serve Man, the people. He must beautify human life and defend it. He must be a citizen first and foremost, so that his art might consciously extol human life and lead man to a radiant future. Such is the immutable code of art as I see it.
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