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National Recovery Administration
(Encyclopedia)National Recovery Administration (NRA), in U.S. history, administrative bureau established under the National Industrial Recovery Act of 1933. In response to President Franklin Delano Roosevelt's cong...nest
(Encyclopedia)nest, structure for the reception and incubation of the eggs of birds, reptiles, insects, and some fish or for the parturition of mammals, and also for the care of the young during their period of hel...wings
(Encyclopedia)CE5 A. Structure of a bird wing B. Structure of a bat wing wings, flight organs of the bird, the bat, and the insect. Birds' wings are pectoral appendages that are basically the same in skeletal...monsters and imaginary beasts
(Encyclopedia)monsters and imaginary beasts. The mythologies and legends of ancient and modern cultures teem with an enormous variety of monsters and imaginary beasts. A great number of these are composites of diff...ray, in zoology
(Encyclopedia)ray, extremely flat-bodied cartilaginous marine fish, related to the shark. The pectoral fins of most rays are developed into broad, flat, winglike appendages, attached all along the sides of the head...Villa, Francisco
(Encyclopedia)Villa, Francisco fränsēsˈkō vēˈyä [key], c.1877–1923, Mexican revolutionary, nicknamed Pancho Villa. His real name was Doroteo Arango. When Villa came of age, he declared his freedom from the...Brooklyn
(Encyclopedia)Brooklyn bro͝okˈlĭn [key], borough of New York City (2020 pop. 2,736,074), 71 sq mi (184 sq ...classification
(Encyclopedia)CE5 classification, in biology, the systematic categorization of organisms into a coherent scheme. The original purpose of biological classification, or systematics, was to organize the vast number...Whitman, Walt
(Encyclopedia)Whitman, Walt (Walter Whitman), 1819–92, American poet, b. West Hills, N.Y. Considered by many to be the greatest of all American poets, Walt Whitman celebrated the freedom and dignity of the indivi...endangered species
(Encyclopedia)endangered species, any plant or animal species whose ability to survive and reproduce has been jeopardized by human activities. In 1999 the U.S. government, in accordance with the U.S. Endangered Spe...Browse by Subject
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