#RAHASYATvIndia About Video -
Part - 1 Of Video
The Mariana Trench or Marianas Trench[1] is located in the western Pacific Ocean about 200 kilometres (124 mi) east of the Mariana Islands, and has the deepest natural trench in the world. It is a crescent-shaped trough in the Earth's crust averaging about 2,550 km (1,580 mi) long and 69 km (43 mi) wide. The maximum known depth is 10,994 metres (36,070 ft) (± 40 metres [130 ft]) at the southern end of a small slot-shaped valley in its floor known as the Challenger Deep.[2] However, some unrepeated measurements place the deepest portion at 11,034 metres (36,201 ft).[3] By comparison: if Mount Everest was placed into the trench at this point, its peak would still be over two kilometres (1.2 mi) under water.[a]
At the bottom of the trench the water column above exerts a pressure of 1,086 bars (15,750 psi), more than 1,000 times the standard atmospheric pressure at sea level. At this pressure, the density of water is increased by 4.96%, so that 95.27 of any unit of volume of water under the pressure of the Challenger Deep would contain the same mass as 100 of those units at the surface. The temperature at the bottom is 1 to 4 °C (34 to 39 °F).[5]
The trench is not the part of the seafloor closest to the center of the Earth. This is because the Earth is an oblate spheroid, not a perfect sphere; its radius is about 25 kilometres (16 mi) smaller at the poles than at the equator.[6] As a result, parts of the Arctic Ocean seabed are at least 13 kilometres (8.1 mi) closer to the Earth's center than the Challenger Deep seafloor.
In 2009, the Marianas Trench was established as a United States National Monument.[7] Xenophyophores have been found in the trench by Scripps Institution of Oceanography researchers at a record depth of 10.6 kilometres (6.6 mi) below the sea surface.[8] Data has also suggested that microbial life forms thrive within the trench.
The Mariana Trench is named after the nearby Mariana Islands (in turn named Las Marianas in honor of Spanish Queen Mariana of Austria, widow of Philip IV of Spain). The islands are part of the island arc that is formed on an over-riding plate, called the Mariana Plate (also named for the islands), on the western side of the trench.
Part - 2 of Video
North Korea (North Korea: 북조선, MR: Pukchosŏn , RR: Bukjoseon , South Korea: 북한, MR: Puk'an, RR: Bukan ), officially the Democratic People's Republic of Korea (DPRK or DPR Korea) (Korean: 조선민주주의인민공화국, Chosŏn Minjujuŭi Inmin Konghwaguk), is a country in East Asia constituting the northern part of the Korean Peninsula, with Pyongyang the capital and the largest city in the country. To the north and northwest, the country is bordered by China and by Russia along the Amnok (known as the Yalu in Chinese) and Tumen rivers[14] and to the south it is bordered by South Korea, with the heavily fortified Korean Demilitarized Zone (DMZ) separating the two. Nevertheless, North Korea, like its southern counterpart, claims to be the legitimate government of the entire peninsula and adjacent islands.[15]
In 1910, Korea was annexed by Imperial Japan. After the Japanese surrender at the end of World War II in 1945, Korea was divided into two zones, with the north occupied by the Soviet Union and the south occupied by the United States. Negotiations on reunification failed, and in 1948, separate governments were formed: the socialist Democratic People's Republic of Korea in the north, and the capitalist Republic of Korea in the south. An invasion initiated by North Korea led to the Korean War (1950–1953). The Korean Armistice Agreement brought about a ceasefire, but no peace treaty was signed.[16]
North Korea officially describes itself as a "self-reliant" socialist state, and formally holds elections,[17] though said elections have been described by outside observers as sham elections.[18][19] Outside observers also generally view North Korea as a Stalinist totalitarian dictatorship,[28] particularly noting the elaborate cult of personality around Kim Il-sung and his family. The Workers' Party of Korea (WPK), led by a member of the ruling family,[29] holds power in the state and leads the Democratic Front for the Reunification of the Fatherland of which all political officers are
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