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backswimmer

(Encyclopedia) backswimmer, common name for water bugs of the cosmopolitan family Notonectidae, so named because they swim upside down, usually near the surface of the water. They have oval bodies…

Velasco, José María

(Encyclopedia) Velasco, José MaríaVelasco, José Maríahōsāˈ märēˈä vāläsˈkō [key], 1840–1912, Mexican landscape painter; teacher of Diego Rivera. A gifted artisan descended from a family of shawl…

Arte Povera

(Encyclopedia) Arte Povera [Ital.,=poor art], influential art movement that arose in Italy in the late 1960s. It was championed by the Italian art critic Germano Celant, who also named (1967) the…

slate

(Encyclopedia) slate, fine-grained rock formed when sedimentary rocks such as shale are metamorphosed by great pressure. Slate splits into perfectly cleaved, broad thin layers; this…

Point Reyes National Seashore

(Encyclopedia) Point Reyes National SeashorePoint Reyes National Seashorerāˈĭs [key], 71,068 acres (28,772 hectares), W Calif.; est. 1962. Included in the area are steep bluffs overlooking the…

porgy

(Encyclopedia) porgyporgypôrˈgē [key], common name for members of the Sparidae, a family of small-mouthed fishes with strong teeth adapted for crushing their food of shellfish and crustaceans.…

pika

(Encyclopedia) pikapikapīˈkə [key], short-haired mammal related to rabbits and hares, also called mouse hare and rock rabbit. Pikas live above the timber line in the mountains of N Asia and W North…