The true source of the Amazon River has been a topic of debate for some time, and now the authors of a study in the journal Area are jumping into the fray. They say the Mantaro River in Peru is the source of the Amazon, but the claim is controversial in that the Mantaro is dry during parts of the year. Some say that disqualifies it from consideration. "You can have the longest tributary, but if it doesn't have continuous flow, then it's a moot point," said Juan Valdés, the geographer at National Geographic.
Published in Brief: