The Western Interior Seaway formed about 100 million years ago when the mountains that now define western North America lifted up as a result of tectonic forces. Those same forces flexed the land east ...

Long before the Great Lakes came to define the heart of North America, a much larger lake once ruled the land. Lake Agassiz, a prehistoric inland sea, spread across the continent with a reach that ...

The deepest part of Lake Erie is about 210 feet. Lake Superior's deepest water is 1,332 feet, which is more than six times the depth of Lake Erie.

From coastlines to heartland, new research suggests the very geography of the United States could be dramatically altered by an accelerating climate crisis. Forget static borders – experts are warning ...

Situated a whopping 3,700 kilometers (2,342 miles) away from the Atlantic Ocean, it’s the farthest inland port in North America to serve oceangoing ships – and that’s not the only thing that ...

Which Great Lake do you always forget? How to remember them: Think of the acronym H.O.M.E.S.: Huron, Ontario, Michigan, Erie and Superior.