natural drainage hole
31archaeology — archaeologist, n. /ahr kee ol euh jee/, n. 1. the scientific study of historic or prehistoric peoples and their cultures by analysis of their artifacts, inscriptions, monuments, and other such remains, esp. those that have been excavated. 2. Rare …
32Wyoming — Wyomingite /wuy oh ming uyt /, n. /wuy oh ming/, n. 1. a state in the NW United States. 470,816; 97,914 sq. mi. (253,595 sq. km). Cap.: Cheyenne. Abbr.: WY (for use with zip code), Wyo., Wy. 2. a city in W Michigan, near Grand Rapids. 59,616. * * …
33mining — /muy ning/, n. 1. the act, process, or industry of extracting ores, coal, etc., from mines. 2. the laying of explosive mines. [1250 1300; ME: undermining (walls in an attack); see MINE2, ING1] * * * I Excavation of materials from the Earth s… …
34agriculture, origins of — Introduction the active production of useful plants or animals in ecosystems that have been created by people. Agriculture has often been conceptualized narrowly, in terms of specific combinations of activities and organisms wet rice production… …
35Aquifer — Typical aquifer cross section An aquifer is a wet underground layer of water bearing permeable rock or unconsolidated materials (gravel, sand, or silt) from which groundwater can be usefully extracted using a water well. The study of water flow… …
36Geography and ecology of the Everglades — The geography and ecology of the Everglades involve the complex elements affecting the natural environment throughout the southern region of the U.S. state of Florida. Before drainage, the Everglades were an interwoven mesh of marshes and… …
37environment — environmental, adj. environmentally, adv. /en vuy reuhn meuhnt, vuy euhrn /, n. 1. the aggregate of surrounding things, conditions, or influences; surroundings; milieu. 2. Ecol. the air, water, minerals, organisms, and all other external factors… …
38medicine, history of — Introduction the development of the prevention and treatment of disease from prehistoric and ancient times to the 20th century. Medicine and surgery before 1800 Primitive (primitive culture) medicine and folklore Unwritten history is not… …
39Everglades National Park — IUCN Category Ib (Wilderness Area) …
40Everglades National Park — Parc national des Everglades Parc national des Everglades Catégorie II de la CMAP (Parc national) …
