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Easter Island
(Encyclopedia) Easter Island, Span. Isla de Pascua, Polynesian Rapa Nui, remote island (2020 est. pop. 5,000), 66 sq mi (171 sq km), in the South…ape
(Encyclopedia) ape, any primate of the superfamily Hominoidea, which includes humans; this article, however, focuses on the nonhuman apes. The small apes, the gibbons and the siamang, and the…galaxy
(Encyclopedia) CE5 Hubble classification of galaxies: Elliptical galaxies (E) are classified according to the degree of flattening of the ellipse. Spiral galaxies (S) and barred spiral galaxies (…El Niño–Southern Oscillation
(Encyclopedia) El Niño–Southern Oscillation (ENSO)El Niño–Southern Oscillationĕl nēnˈyō [key], large-scale climatic fluctuation of the tropical Pacific Ocean and the overlying atmosphere. The El Niño…tiger
(Encyclopedia) tiger, large carnivore of the cat family, Panthera tigris, found in the forests of Asia. There are six subspecies of P. tigris: Amur or Siberian, Sumatran, Malayan, North Indochinese,…Hubble's law
(Encyclopedia) Hubble's law, in astronomy, statement that the distances between galaxies (see galaxy) or clusters of galaxies are continuously increasing and that therefore the universe is expanding…mosquito
(Encyclopedia) mosquitomosquitoməskēˈtō [key], small, long-legged insect of the order Diptera, the true flies. The females of most species have piercing and sucking mouth parts and apparently they…population
(Encyclopedia) population, the inhabitants of a given area, but perhaps most importantly, the human inhabitants of the earth (numbering about 7.5 billion in 2017), who by their increasing numbers and…Reign of Terror
(Encyclopedia) Reign of Terror, 1793–94, period of the French Revolution characterized by a wave of executions of presumed enemies of the state. Directed by the Committee of Public Safety, the…universe
(Encyclopedia) universe, totality of matter and energy in existence. The study of the origin of the universe, or cosmos, is known as cosmogony, and that of its structure and evolution, cosmology. The…