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The Antarctic Circle is the northernmost latitude in the Southern Hemisphere at which the centre of the sun can remain continuously above the horizon for twenty-four hours; as a result, at least once each year at any location within the Antarctic Circle the centre of the sun is visible at local midnight, and at least once the centre of the sun is below the horizon at local noon.
Tourists at Niagara Falls.. Tourism geography is the study of travel and tourism, as an industry and as a social and cultural activity. Tourism geography covers a wide range of interests including the environmental impact of tourism, the geographies of tourism and leisure economies, answering tourism industry and management concerns and the sociology of tourism and locations of tourism.
GEO-3 may refer to: . the third in a series of Global Environment Outlook reports issued in 2002 by the United Nations Environmental Program; SBIRS GEO 3, the potential third in a series of geosynchronous orbit space surveillance satellites planned as part of the United States Air Force's Space-Based Infrared System
The National Geographic GeoBee (called the National Geographic Bee from 2001 to 2018, [1] also referred to as the Nat Geo Bee) was an annual geography contest sponsored by the National Geographic Society. The bee, held annually from 1989 to 2019, was open to students in the fourth through eighth grades in participating schools from the United ...
NEOGEO Station was a brand by M2 for downloadable Neo Geo games that were previously available to be purchased from the PlayStation Store for Sony's PlayStation 3 (PS3), PlayStation Portable (PSP) and PlayStation Vita (PSV) video game consoles in all regions. All games in this series have been de-listed from the PlayStation Store. [1]
The fundamental unit within a geopolymer structure is a tetrahedral complex consisting of silicon or aluminum coordinated through covalent bonds to four oxygens. The geopolymer framework results from the cross-linking between these tetrahedra, which leads to a 3-dimensional aluminosilicate network, where the negative charge associated with tetrahedral aluminium is balanced by a small cationic ...