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  1. 3 hours ago · Many mathematical problems have been stated but not yet solved. These problems come from many areas of mathematics, such as theoretical physics, computer science, algebra, analysis, combinatorics, algebraic, differential, discrete and Euclidean geometries, graph theory, group theory, model theory, number theory, set theory, Ramsey theory, dynamical systems, and partial differential equations.

  2. 1 day ago · The following is a list of notable unsolved problems grouped into broad areas of physics. Some of the major unsolved problems in physics are theoretical, meaning that existing theories seem incapable of explaining a certain observed phenomenon or experimental result. The others are experimental, meaning that there is a difficulty in creating an experiment to test a proposed theory or investigate a phenomenon in greater detail. There are still some questions beyond the Standard Model of ...

  3. en.wikipedia.org › wiki › RussiaRussia - Wikipedia

    1 day ago · Russia has nine major mountain ranges, and they are found along the southernmost regions, which share a significant portion of the Caucasus Mountains (containing Mount Elbrus, which at 5,642 m (18,510 ft) is the highest peak in Russia and Europe); the Altai and Sayan Mountains in Siberia; and in the East Siberian Mountains and the Kamchatka Peninsula in the Russian Far East (containing Klyuchevskaya Sopka, which at 4,750 m (15,584 ft) is the highest active volcano in Eurasia).

  4. 1 day ago · IANA distinguishes the following groups of top-level domains: infrastructure top-level domain (ARPA); generic top-level domains (gTLD); generic-restricted top-level domains (grTLD)

  5. en.wikipedia.org › wiki › AntarcticaAntarctica - Wikipedia

    1 day ago · Antarctica. Antarctica ( / ænˈtɑːrktɪkə / ⓘ) [note 1] is Earth 's southernmost and least-populated continent. Situated almost entirely south of the Antarctic Circle and surrounded by the Southern Ocean (also known as the Antarctic Ocean ), it contains the geographic South Pole.

  6. en.wikipedia.org › wiki › DelawareDelaware - Wikipedia

    3 hours ago · Since 2016, data for births of White Hispanic origin are not collected, but included in one Hispanic group; persons of Hispanic origin may be of any race. Languages. In 2000, 91% of Delaware residents of age 5 and older spoke only English at home; 5% spoke Spanish. French was the third most spoken language, used by 0.7% of the population ...

  7. en.wikipedia.org › wiki › TennesseeTennessee - Wikipedia

    1 day ago · Tennessee. Tennessee ( / ˌtɛnɪˈsiː / ⓘ TEN-iss-EE, locally / ˈtɛnɪsi / TEN-iss-ee ), [8] [9] [10] officially the State of Tennessee, is a landlocked state in the Southeastern region of the United States. It borders Kentucky to the north, Virginia to the northeast, North Carolina to the east, Georgia, Alabama, and Mississippi to the ...