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Great Lakes

Carving Great Lakes
Image: NASA

Carving Great Lakes

The five vast bodies of water called the Great Lakes didn’t just fill up with water overnight, or even over a few years or decades.

A powerful prehistoric force of nature first carved Superior, Michigan, Huron, Erie, and Ontario into the landscape. Try to figure out what it was. Hint: The clues lie in the grooves in the bedrock beneath the water and silt.

National Geographic
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About Our Great Lakes

About Our Great Lakes

Holding 90% of our freshwater and some 250 species of fish, the Great Lakes face all sorts of threats. Explore them lake-by-lake or pick up facts about them as a group. More...

Interactive
NOAA
Ancient Waterfalls

Ancient Waterfalls

Lakebed features show that water levels were once much lower in the Great Lakes. See how scientists found evidence of giant waterfalls that roared over cliffs 8,000 years ago. More...

Video
National Geographic
Asteroid Hits Lakes

Asteroid Hits Lakes

They flow east today, but the Great Lakes changed direction 13,000 years ago, thanks to a force from outer space. Find out how an asteroid diverted their flow from the Gulf of Mexico in the south. More...

Video
National Geographic
Great Lakes Cleanup

Great Lakes Cleanup

Discover how scientists are working to remove sediments that contaminated Lake Michigan 50 years ago — and how kids are making the ecosystem healthy for the future. More...

Video
National Geographic
Great Lakes History & Culture

Great Lakes History & Culture

More than just bodies of water, the Great Lakes have long been home to many. Explore the region's native peoples, well-known environmental writers, and the Mackinac Bridge designer. More...

Article
Great Lakes Information Network
Maps and GIS of the Great Lakes Region

Maps and GIS of the Great Lakes Region

Get an aerial view of the Great Lakes river system, snow and ice coverage, prehistoric glacier movement, and more in this gallery of images. More...

Images
Great Lakes Information Network
Scientist Profile: Hydrologist

Scientist Profile: Hydrologist

Meet hydrology technician Vidal Mendoza, who collects data to rate how much water is flowing in Texas rivers. Find out what he likes most about his career. More...

Profile
DragonflyTV/PBS
Tiny Mussels Invade Great Lakes, Threaten Fishing Industry

Tiny Mussels Invade Great Lakes, Threaten Fishing Industry

A tiny mollusk is causing huge damage in the Great Lakes. See how the invasive quagga mussel is infecting the ecosystem of all 5 Great Lakes waterways and threatening the livelihoods of fishermen. More...

Video
PBS NewsHour
Tour: Great Lakes

Tour: Great Lakes

You'll see everything from shipwrecks and sinkholes to locks and waves when you take these video tours of the Great Lakes. More...

Video
NOAA

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