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transportation

(Encyclopedia) transportation, conveyance of goods and people over land, across water, and through the air. See also commerce. The first practical attempts at air transportation began with the…

Oceans and Seas

Top of Page Source: Getty ImagesWater is arguably one of the most important substances on Earth, essential not only for flora and fauna, but for sustaining human life. As such, waterways are crucial…

Congo, river, Africa

(Encyclopedia) CongoCongokŏngˈgō [key] or ZaïreCongozīˈēr, zäērˈ [key], great river of equatorial Africa, c.2,720 mi (4,380 km) long, formed by the waters of the Lualaba River and its tributary, the…

Across the Great Divide

Chapter 13 Chapter 15 Across the Great Divide Captain Clark had now left the water-shed of the Missouri behind him, and was pressing on, over a broken, hilly country, to the…

Lewis & Clark: Across the Great Divide

by NoahBrooks From the Minnetarees to the ShoshoneesDown the Pacific SlopeAcross the Great Divide Captain Clark had now left the water-shed of the Missouri behind him…

flood, in hydrology

(Encyclopedia) flood, inundation of land by the rise and overflow of a body of water. Floods occur most commonly when water from heavy rainfall, from melting ice and snow, or from a combination of…

Down the Columbia to Tidewater

Chapter 15 Chapter 17 Down the Columbia to Tidewater The voyagers were now drifting down the Columbia River, and they found the way impeded by many rapids, some of them very…