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Paroxysmal nocturnal hemoglobinuria ( PNH) is a rare, acquired, [ 1] life-threatening disease of the blood characterized by destruction of red blood cells by the complement system, a part of the body's innate immune system. This destructive process occurs due to deficiency of the red blood cell surface protein DAF, which normally inhibits such ...
Skyline. (construction set) American Skyline was a construction set sold in the late 1950s and early 1960s by Elgo Plastics/Halsam Products Company from Chicago, Illinois. [1] [2] With an American Skyline set, its owner could piece together models of high-rise city buildings.
Men's pole vault world record progression. The first world record in the men's pole vault was recognized by the International Association of Athletics Federations in 1912. [ 1] As of June 21, 2009, 71 world records have been ratified by the IAAF (now World Athletics) in the event. Since 2000, World Athletics makes no distinction between indoor ...
Pole vaulters who spoke to Yahoo Sports said they travel with six to 10 fiberglass or carbon-fiber poles that cost up to $1,000 apiece and range in length from 14 to 17 feet.
Approximately 50,000–60,000 Poles died as a result of the massacres in Volhynia, while up to 2,000–3,000 Ukrainians died as a result of Polish retaliatory actions. [20] [21] [22] At the 3rd OUN Congress in August 1943, Mykola Lebed criticised the Ukrainian Insurgent Army's actions in Volhynia as "bandit".
About 22% of 18- to 24-year-old Australians reported using e-cigarettes or vaping devices at least once, governmental data last year showed.
A geomagnetic reversal is a change in a planet's dipole magnetic field such that the positions of magnetic north and magnetic south are interchanged (not to be confused with geographic north and geographic south ). The Earth's magnetic field has alternated between periods of normal polarity, in which the predominant direction of the field was ...
Totem pole. A Gitxsan pole (left) and Kwakwaka'wakw pole (right) at Thunderbird Park in Victoria, Canada. Totem poles ( Haida: gyáaʼaang) [ 1] are monumental carvings found in western Canada and the northwestern United States. They are a type of Northwest Coast art, consisting of poles, posts or pillars, carved with symbols or figures.