How much fresh water is in the United States? It's a tough question, since most of the water is underground, accessible at ...

A team has created the most complete map of the world's rivers ever made offering a major leap forward for flood prediction, climate risk planning, and water resource management in a warming world.

The Cooperative National Geologic Map offers a complete and detailed look at the bedrock and fault systems of the continental United States. The first geological map of the United States was published ...