Brazilian scientists have discovered an underground river with depth of up to four thousand meters. This river flows from west to east like the country’s famous waterway. A team of scientists led by Elizabeth Pimentel came to the conclusion from studying 241 wells drilled by the state oil giant Petrobras in the Amazon region. A statement this week from Brazil’s National Observatory named the underground river Hamza and said it represents one of two different draining systems for the large rainforest region. According to scientists this underground river flows much more slowly than the Amazon, and that its existence may explain the low salt level in the Amazon, even in near the mouth.