The Amazon is no ordinary river. It holds more water than the Nile, Yangtze, and Mississippi put together. Its drainage basin-- a giant saucer rimmed by the Andes Mountains-- is ten times the size of Texas, and takes water from one-third of South America. We follow the Amazon River from the high peaks of the Andes in Peru to the Atlantic coast of Brazil, thousands of miles to the east. We pass through ancient mountain civilizations and tropical rain...