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snowball earth
(Encyclopedia)snowball earth, hypothesized condition in which the earth was covered completely by ice during several periods in the Proterozoic. The hypothesis was originally developed to explain evidence of the co...midge
(Encyclopedia)midge, name for any of numerous minute, fragile flies in several families. The family Chironomidae consists of about 2,000 species, most of which are widely distributed. The herbivorous larvae are fou...Essex, Robert Devereux, 3d earl of
(Encyclopedia)Essex, Robert Devereux, 3d earl of, 1591–1646, English parliamentary general; son of Robert Devereux, 2d earl of Essex. James I restored him (1604) to the estates of his father and arranged his marr...chartered companies
(Encyclopedia)chartered companies, associations for foreign trade, exploration, and colonization that came into existence with the formation of the European nation states and their overseas expansion. An associatio...mouth
(Encyclopedia)mouth, entrance to the digestive and respiratory tracts. The mouth, or oral cavity, is ordinarily a simple opening in lower animals; in vertebrates it is a more complex structure. In humans, the mouth...creationism
(Encyclopedia)creationism or creation science, belief in the biblical account of the creation of the world as described in Genesis, a characteristic especially of fundamentalist Protestantism (see fundamentalism). ...Lucas, George W., Jr.
(Encyclopedia)Lucas, George W., Jr., 1944–, American film director, producer, and writer, b. Modesto, Calif. Although Lucas's first film, THX-1138 (1970), was not successful, his next two, American Graffiti (1973...chaos theory
(Encyclopedia)chaos theory, in mathematics, physics, and other fields, a set of ideas that attempts to reveal structure in aperiodic, unpredictable dynamic systems such as cloud formation or the fluctuation of biol...Papandreou, George, 1952–, Greek political leader
(Encyclopedia)Papandreou, George (Georgios Andreou Papandreou) päˌpəndrāˈo͞o [key], 1952–, Greek political leader, b. Minnesota. The son of Andreas Papandreou and grandson of George Papandreou (1888–1968)...Janus, in astronomy
(Encyclopedia)Janus jāˈnəs [key], in astronomy, one of the named moons, or natural satellites, of Saturn. Also known as Saturn X (or S10), Janus is an irregularly shaped (nonspherical) body measuring about 122 m...Browse by Subject
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