People in ancient Mesopotamia depended on rivers. But rivers sometime moved, imposing stress on communities. Research shows ...

River cruises often elicit a lackluster response—conjuring images of slow-moving vessels brimming with family reunion ...

Colorado is among the country's top rafting destinations. The state has roughly 20 whitewater rivers, and commercial rafting ...

"Wonders of the world" lists barely scratch the surface of all the awe-inspiring destinations on this planet. These places ...