By Laurie Burnham
From Earth's longest rivers, which circulate via African deserts and Amazon jungles, to Siberia's nice Yenisei-Angara river procedure, which drains into the Arctic Ocean, this attractive new ebook vividly brings the world's nice waterways into concentration. scholars will realize how those rivers got here to exist, their position in background, what makes every one strange, and present environmental demanding situations. ''In the Field'' sidebars disguise such issues as tracking salinity, measuring stream, drilling for oil, ice breakers in motion, and extra. pictures, line illustrations, a systematic word list, and source listings for additional info handsomely complement the textual content.
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Sample text
Here the river brings water—and therefore life—to one of the world’s harshest deserts. One need only look at satellite images to understand the importance of the Nile to Northeast Africa. Such photos show a lush, water-fed Nile valley snaking through an otherwise barren and brown landscape. Without the Nile, Egypt’s Nile River Valley would be as lifeless as its desert surroundings. At a town called Qena, the Nile shifts toward the east and broadens into an area known as the Valley of the Kings, where the ancient pharaohs were entombed (see the color insert, p.
The woody flotsam chokes smaller tributaries, making navigation difficult. Although the trees eventually make their way downriver, the journey may take 10 years or more. The Madeira starts life high in the Andes as a small stream, less than 10 feet (3 m) wide. Fed by melting snow, its temperatures hover around 53°F (12°C), significantly lower than the Amazon’s comparatively balmy 82°F (28°C). As the river descends from 13,000 feet (3,962 m), cascading down the Andean slopes, it passes through pristine cloud forests, bringing coolness to them.
He had no idea, of course, what river they were on, what they might encounter en route, or even where they would end up. Some even say Orellana’s reports of seeing female warriors along the way gave the river its name. In that year, French mathematician Charles-Marie de La Condamine sailed up the Amazon, returning to France with geological data and thousands of specimens of strange plants and animals for the Académie Royale des Sciences. Today explorers still travel its many tributaries, wanting to experience this lush repository of life and see animals and plants that perhaps no one else has seen.