(Encyclopedia) emerald, the green variety of beryl, of which aquamarine is the blue variety. Chemically, it is a beryllium-aluminum silicate whose color is due to small quantities of chromium…
(Encyclopedia) Marcos de NizaMarcos de Nizamärˈkōs dā nēˈsä [key], c.1495–1558, missionary explorer in Spanish North America. A Franciscan friar, he served in Peru and Guatemala before going to…
(Encyclopedia) AtahualpaAtahualpaätäwälˈpä [key], d. 1533, favorite son of Huayna Capac, Inca of Peru. At his father's death (1525) he received the kingdom of Quito while his half-brother, the…
(Encyclopedia) UcayaliUcayali&oomacr;käyäˈlē [key], river, c.1,000 mi (1,610 km) long, formed by the confluence of the Apurímac and Urubamba rivers, E Peru, and flowing generally north through a…
(Encyclopedia) repartimientorepartimientorāpärtēmyĕnˈtō [key], in Spanish colonial practice, usually, the distribution of indigenous people for forced labor. In a broader sense it referred to any…
(Encyclopedia) PotosíPotosípōtōsēˈ [key], city (1992 pop. 112,078), capital of Potosí dept., S Bolivia, at the foot of one of the world's richest ore mountains. In the cold, bleak, high Andes at an…
(Encyclopedia) Pickering, Edward Charles, 1846–1919, American astronomer and physicist, b. Boston, grad. Harvard (B.S., 1865); brother of W. H. Pickering. He was professor of physics (1868–77) at the…
First Place: $100,000 scholarship, David Lawrence Vigliarolo Bauer, 17, Hunter College High School, Bronx, N.Y., for developing a sensor for rapidly detecting individual exposure to toxic…
This Top Ten list was compiled by the Technical Advisory Board of the Blacksmith Institute, an environmental NGO based in New York. The criteria used in ranking the include the size of the affected…
This Top Ten list was compiled by the Technical Advisory Board of the Blacksmith Institute, an environmental NGO based in New York. The criteria used in ranking the include the size of the affected…
