The mysteries of the Amazon rain forest

"An exploration of mysteries concerning the Amazon rain forest that have puzzled scholars, explorers, and experts. Discusses evidence for large, pre-Columbian urban areas in the Amazon and why such urban centers went undiscovered for so long. Features include maps, fact boxes, biographies of famous experts on Amazonian culture, places to see and visit, a glossary, further readings, and index"-- Provided by publisher.