It is difficult to determine the size of a river – they are often part of massive river systems that make length hard to measure. For this video, we only included the river stems in compiling our list ...

While millions of Arkansans have grown up within miles of the Mississippi River, it doesn’t exactly make the list for popular day trip destinations, and with good reason: Northwest Arkansas and Hot ...

Seeing a toxic blue-green algae bloom in the St. Johns River has become more common as more pollution flows into the river from toxic sewage sludge. (Photo via the St. Johns RIverkeeper) What is it ...