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lungfish
(Encyclopedia)lungfish, common name for any of a group of fish belonging to the families Ceratodontidae, Lepidosirenidae, and Protopteridae, found in the rivers of Australia, South America, and Africa, respectively...dating
(Encyclopedia)dating, the determination of the age of an object, of a natural phenomenon, or of a series of events. There are two basic types of dating methods, relative and absolute. In relative dating, the tempor...dragonfly
(Encyclopedia)dragonfly, any insect of the order Odonata, which also includes the damselfly. Members of this order are generally large predatory insects and characteristically have chewing mouthparts and four membr...Text of the Constitution of the United States
(Encyclopedia) Text1 of the Constitution of the United States Preamble Article I Article II Article III Article IV Article V Article VI Article VII Amendment I Amendment II Am...lamprey
(Encyclopedia)lamprey, name for several primitive marine and freshwater jawless fishes of the order Petromyzontiformes. As in the other jawless fish, the hagfish, the adult lamprey retains the notochord, the suppor...Tyrannosaurus
(Encyclopedia)Tyrannosaurus tīrănˌōsôrˈəs, tĭr– [key] [Gr.,=tyrant lizard], member of a family, Tyrannosauridae, of bipedal carnivorous saurischian dinosaurs characterized by having strong hind limbs, a m...Addison's disease
(Encyclopedia)Addison's disease [for Thomas Addison], progressive disease brought about by atrophy of the outer layer, or cortex, of the adrenal gland; it is also called chronic adrenocortical insufficiency. The de...Henderson, Arthur
(Encyclopedia)Henderson, Arthur, 1863–1935, British statesman, organizer and leader of the British Labour party. In early life he was an ironworker and a labor union leader. Elected (1903) to Parliament, he was c...Orion Nebula
(Encyclopedia)Orion Nebula, bright diffuse nebula in the constellation Orion; also known as the Great Nebula of Orion and cataloged as M42 or NGC 1976. It is located near the middle of the “sword” hanging from ...Ciudad Bolívar
(Encyclopedia)Ciudad Bolívar syo͞oᵺäᵺˈ bōlēˈvär [key], city, capital of Bolívar state,...Browse by Subject
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