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Niger, country, Africa
(Encyclopedia) CE5 NigerNigernīˈjər, nēzhârˈ [key], officially Republic of Niger, republic (2015 est. pop. 18,045,729), 489,189 sq mi (1,267,000 sq km), W Africa. It borders on Burkina Faso and…astronomy
(Encyclopedia) astronomy, branch of science that studies the motions and natures of celestial bodies, such as planets, stars, and galaxies; more generally, the study of matter and energy in the…physics
(Encyclopedia) physics, branch of science traditionally defined as the study of matter, energy, and the relation between them; it was called natural philosophy until the late 19th cent. and is still…mathematics
(Encyclopedia) mathematics, deductive study of numbers, geometry, and various abstract constructs, or structures; the latter often “abstract” the features common to several models derived from the…Greece
(Encyclopedia) CE5 Greece, Gr. Hellas or Ellas, officially Hellenic Republic, republic (2015 est. pop. 11,218,000), 50,944 sq mi (131,945 sq km), SE Europe. It occupies the southernmost part of…Trending
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