New research suggests an ancient hotspot helped shape the Great Lakes, challenging traditional formation theories.

North America is home to the Great Lakes—Huron, Ontario, Michigan, Erie, and Superior—spanning the borders of several U.S. states and Canada. These vast freshwater bodies are renowned for ...

The Great Lakes region contains nearly 85 percent of North America's surface freshwater ... [Click here or on the map above for a larger version.] The primary concern with the current mining proposals ...

The Great Lakes region contains nearly 85 percent of North America's surface freshwater ... [Click here or on the map above for a larger version.] The primary concern with the current mining proposals ...