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How Beavers Helped to Build America

Once abundant and widespread, beavers helped to forge the ground under our feet, making water safe to drink and the land an oasis for life.

By Jennifer Viegas

Beavers, once abundant and widespread in the Northern Hemisphere, helped to forge the ground underneath many Americans’ feet

The team behind a new study used ground-penetrating radar to detect buried beaver dams.

The study, published in the January 2012 issue of Geology, reveals how beaver activity up to thousands of years ago affected sedimentation and left its lasting mark within North America’s ground.

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