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radioactivity
(Encyclopedia) CE5 Effects of a magnetic field on the products of radioactivity CE5 Disintegration series: Radioactive decay of radium-226 into lead-206 radioactivity, spontaneous disintegration or decay of t...birth control
(Encyclopedia)birth control, practice of contraception for the purpose of limiting reproduction. Although contraceptive techniques had been known in ancient Egypt, Greece, and Rome, the modern movement for birth ...Nobel Prizes (table)
(Encyclopedia)Nobel Prizescomic strip
(Encyclopedia)comic strip, combination of cartoon with a story line, laid out in a series of pictorial panels across a page and concerning a continuous character or set of characters, whose thoughts and dialogues a...electricity
(Encyclopedia) CE5 Electrical and radio symbols electricity, class of phenomena arising from the existence of charge. The basic unit of charge is that on the proton or electron—the proton's charge is designate...costume
(Encyclopedia)costume, distinctive forms of clothing, including official or ceremonial attire such as ecclesiastical vestments, coronation robes, academic gowns, armor, and theatrical dress. The use of ornament pre...Guinea, country, Africa
(Encyclopedia) CE5 Guinea gĭnˈē [key], officially Republic of Guinea, republic (2015 est. pop. 12,092,000), 94,925 sq mi (245,856 sq km), W Africa. It is bounded on the north by Guinea-Bissau, Senegal, and Mal...Minnesota, state, United States
(Encyclopedia) CE5 Minnesota mĭnˌĭsōˈtə [key], upper midwestern state of the United States. It is bordered by Lake Superior and Wisconsin (E), Iowa (S), South Dakota and North Dakota (W), and the Canadian p...Madagascar
(Encyclopedia) CE5 Madagascar mădˌəgăsˈcär [key], officially Republic of Madagascar, republic (2015 est. pop. 24,234,000), 226,658 sq mi (587,045 sq km), in the Indian Ocean, separated from E Africa by the ...Napoleon I
(Encyclopedia) CE5 Napoleonic Europe (1812) Napoleon I nəpōˈlēən, Fr. näpôlāōNˈ [key], 1769–1821, emperor of the French, b. Ajaccio, Corsica, known as “the Little Corporal.” The Napoleonic...Browse by Subject
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