Pristina vs Cobalt

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Pristina (UK: , US: , Albanian pronunciation: [pɾiʃˈtinə] (listen); Albanian: Prishtina or Prishtinë, Serbian: Приштина / Priština) is the capital of Kosovo and the seat of the eponymous municipality and district. Its population is predominantly Albanian-speaking constituting the second-largest such city in Europe, after Tirana. The city is located in the northeastern section of Kosovo in a relatively flat plain close to the Gollak mountains. During the Paleolithic Age, what is now the area of Pristina was involved by the Vinča culture. It was home to several Illyrian and Roman people at the classical times. King Bardyllis brought various tribes together in the area of Pristina in the 4th century BC, establishing the Dardanian Kingdom. The heritage of the classical era is still evident in the city, represented by ancient city of Ulpiana, that was considered one of the most important Roman cities in the Balkan peninsula. Between the 5th and the 9th century the area was part of the Byzantine Empire. In the middle of the 9th century it was ceded to the First Bulgarian Empire. In the early 11th century it fell under Byzantine rule and was included into a new province called Bulgaria. Between the late 11th and middle of the 13th century it was ceded several times to the Second Bulgarian Empire.

In the late Middle Ages, Pristina was an important town in Medieval Serbia and also the royal estate of Stefan Milutin, Stefan Uroš III, Stefan Dušan, Stefan Uroš V and Vuk Branković. Following the Ottoman conquest of the Balkans, Pristina became an important mining and trading center due to its strategic position near the rich mining town of Novo Brdo. The city was known for its trade fairs and items, such as goatskin and goat hair as well as gunpowder. The first mosque in Pristina was built in the late 14th century while under Serbian rule.Pristina is the most important transportation junction of Kosovo, for air, rail, and roads. The city's international airport is the largest airport of the country and among the largest in the region. A range of expressways and motorways, such as the R 6 and R 7, radiate out the city and connect it to Albania and North Macedonia. Pristina is as well as the most essential economic, financial, political and trade center of Kosovo mostly due to its significant location in the center of the country. It is the seat of power of the Government of Kosovo, the residences for work of the president and prime minister of Kosovo and the Parliament of Kosovo.

Source: Wikipedia

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Cobalt is a chemical element with the symbol Co and atomic number 27. Like nickel, cobalt is found in the Earth's crust only in chemically combined form, save for small deposits found in alloys of natural meteoric iron. The free element, produced by reductive smelting, is a hard, lustrous, silver-gray metal. Cobalt-based blue pigments (cobalt blue) have been used since ancient times for jewelry and paints, and to impart a distinctive blue tint to glass, but the color was later thought to be due to the known metal bismuth. Miners had long used the name kobold ore (German for goblin ore) for some of the blue-pigment-producing minerals; they were so named because they were poor in known metals, and gave poisonous arsenic-containing fumes when smelted. In 1735, such ores were found to be reducible to a new metal (the first discovered since ancient times), and this was ultimately named for the kobold. Today, some cobalt is produced specifically from one of a number of metallic-lustered ores, such as cobaltite (CoAsS). The element is, however, more usually produced as a by-product of copper and nickel mining.

The copper belt in the Democratic Republic of the Congo (DRC) and Zambia yields most of the global cobalt production. World production in 2016 was 116,000 metric tons (114,000 long tons; 128,000 short tons) (according to Natural Resources Canada), and the DRC alone accounted for more than 50%.Cobalt is primarily used in lithium-ion batteries, and in the manufacture of magnetic, wear-resistant and high-strength alloys. The compounds cobalt silicate and cobalt(II) aluminate (CoAl2O4, cobalt blue) give a distinctive deep blue color to glass, ceramics, inks, paints and varnishes. Cobalt occurs naturally as only one stable isotope, cobalt-59. Cobalt-60 is a commercially important radioisotope, used as a radioactive tracer and for the production of high-energy gamma rays. Cobalt is the active center of a group of coenzymes called cobalamins. Vitamin B12, the best-known example of the type, is an essential vitamin for all animals. Cobalt in inorganic form is also a micronutrient for bacteria, algae, and fungi.

Source: Wikipedia