In the past 20 years, there has been an explosion in the number of beaver dams in Alaska’s tundra region.

University of Alaska Fairbanks research professor Ken Tape and his colleagues reported that the number of beaver ponds near the town of Kotzebue rose from two in 2002 to 98 in 2019, according to Smithsonian magazine. A nearby peninsula saw the number of beaver dams grow from 94 to 409 between 2010 and 2019.

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