Rivers join downstream, flow downhill, and eventually meet an ocean or terminal lake: These are fundamental rules of how ...

Because the Amazon is several degrees cooler than the Rio Negro, they run side by side for miles without mixing. It is a popular sight on boat tours and river expeditions. The Amazon's largest ...

The book Peixes do Rio Negro [Fish of the River Rio Negro], organized by Mônica de Toledo ... Fascinated by the richness of the ichthyological Amazon fauna, Wallace was also accompanied on his journey ...