CHICAGO — As an ice sheet thousands of feet thick began its final crawling retreat from North America to the Arctic toward the end of the last glacial period some 10,000 years ago, it left behind the ...
The five Great Lakes together form the greatest connected area of fresh water on earth. The basins of the Great Lakes were probably scooped out by glaciers during the Ice Age. As the glaciers pushed ...
Glacial lakes are common in the Himalayas, as this satellite view shows. Some are dammed by glaciers, other by moraines. Photo: NASA In August 2023, residents of Juneau, Alaska, watched as the ...
The Great Lakes make up the largest freshwater system in the world. Can you name the national parks found near and along their shores? They preserve natural phenomena and cultural history distinctive ...
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