Novaya Zemlya in the context of "Barents Sea"

The Ural Mountains (/ˈjʊərəl/ YOOR-əl), or simply the Urals, are a mountain range in Eurasia that runs north–south mostly through Russia, from the coast of the Arctic Ocean to the river Ural and northwestern Kazakhstan. The mountain range forms part of the conventional boundary between the continents of Europe and Asia, marking the separation between European Russia and Siberia. Vaygach Island and the islands of Novaya Zemlya form continuations of the chain to the north into the Arctic Ocean. The average altitudes of the Urals are around 1,000–1,300 metres (3,300–4,300 ft), the highest point being Mount Narodnaya, which reaches a height of 1,894 metres (6,214 ft).

The mountains lie within the Ural geographical region and significantly overlap with the Ural Federal District and the Ural economic region. Their resources include metal ores, coal, precious and semi-precious stones. Since the 18th century, the mountains have contributed significantly to the mineral sector of the Russian economy. The region is one of the largest centers of metallurgy and heavy industry production in Russia.

The most isolated major summits of Europe by topographic isolation are located in the European continent and its tectonic and geographic boundaries. This includes major mountain peaks of fold and fault-block mountains, and also volcanoes, located not only in the European Mainland, but also those located on lands and islands on the limits of Europe, like the North Atlantic Ocean islands of the Azores and Iceland, the Arctic Ocean islands of Jan Mayen, Svalbard archipelago and Novaya Zemlya archipelago, the Mediterranean island of Sicily, the Ural Mountains, and Mount Elbrus. The last mentioned is HP of the transboundary Caucasus Mountains and Greater Caucasus region, but as a geologically separate stratovolcano, it is entirely laying in Europe (and Russia), 20 km (12 mi) north of the main ridge of the Greater Caucasus, considered as the one that is forming the limits of Europe. The definition excludes island clearly lying on the African Plate and outside the geographic limits of Europe, like the Canaries and Madeira. The active volcano of Mount Etna is somehow on, or just outside the boundaries of the Eurasian Plate, resting on the subduction boundary where the African tectonic plate is being pushed under the Eurasian plate, but geographically is part of Europe, and is also included in the Top 10 lists.

The Arctic (/ˈɑːr(k)tɪk/; from Ancient Greek ἄρκτος (árktos) 'bear') is the polar region of Earth that surrounds the North Pole, lying north of the Arctic Circle. The Arctic region, from the IERS Reference Meridian travelling east, consists of parts of northern Norway (Nordland, Troms, Finnmark, Svalbard and Jan Mayen), northernmost Sweden (Västerbotten, Norrbotten and Lappland), northern Finland (North Ostrobothnia, Kainuu and Lappi), Russia (Murmansk, Siberia, Nenets Okrug, Novaya Zemlya), the United States (Alaska), Canada (Yukon, Northwest Territories, Nunavut), Danish Realm (Greenland), and northern Iceland (Grímsey and Kolbeinsey), along with the Arctic Ocean and adjacent seas.

Land within the Arctic region has seasonally varying snow and ice cover, with predominantly treeless permafrost under the tundra. Arctic seas contain seasonal sea ice in many places.

Nuclear weapons tests are experiments carried out to determine the performance of nuclear weapons and the effects of their explosion. Over 2,000 nuclear weapons tests have been carried out since 1945. Nuclear testing is a sensitive political issue. Governments have often performed tests to signal strength. Because of their destruction and fallout, testing has seen opposition by civilians as well as governments, with international bans having been agreed on. Thousands of tests have been performed, with most in the second half of the 20th century.

The first nuclear device was detonated as a test by the United States at the Trinity site in New Mexico on July 16, 1945, with a yield approximately equivalent to 20 kilotons of TNT. The first thermonuclear weapon technology test of an engineered device, codenamed Ivy Mike, was tested at the Enewetak Atoll in the Marshall Islands on November 1, 1952 (local date), also by the United States. The largest nuclear weapon ever tested was the Tsar Bomba of the Soviet Union at Novaya Zemlya on October 30, 1961, with the largest yield ever seen, an estimated 50–58 megatons.

The Tsar Bomba (code name: Ivan or Vanya, internal designation "AN602") was the most powerful nuclear weapon or weapon of any kind ever constructed and tested. A project of the Soviet Union, it was a thermonuclear aerial bomb, tested on 30 October 1961 at the Novaya Zemlya site in the country's far north. The bomb yielded 50 megatons of TNT.

The Soviet physicist Andrei Sakharov oversaw the project at Arzamas-16, while the main work of design was by Sakharov, Viktor Adamsky, Yuri Babayev, Yuri Smirnov [ru], and Yuri Trutnev. The project was ordered by First Secretary of the Communist Party Nikita Khrushchev in July 1961 as part of the Soviet resumption of nuclear testing after the Test Ban Moratorium, with the detonation timed to coincide with the 22nd Congress of the Communist Party of the Soviet Union (CPSU).

The Uralian orogeny refers to the long series of linear deformation and mountain building events that raised the Ural Mountains, starting in the Late Carboniferous and Permian periods of the Palaeozoic Era, c. 323–299 and 299–251 million years ago (Mya) respectively, and ending with the last series of continental collisions in Triassic to early Jurassic times.

The region affected by the orogeny, the Uralian orogenic belt or the Uralides, is usually thought of as the boundary between Europe and Asia. It extends from the Aral Sea to Novaya Zemlya, and it includes in addition to the Ural Mountains, the Pay-Khoy Ridge of northwest Russia and the Mugodzhar Hills of northwest Kazakhstan. Its total length is about 3,500 kilometres (2,200 mi), of which the Ural Mountains are about 2,500 km (1,600 mi).