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Oh Google Earth, how I love thee.
Discovered in 2007 using the online satellite imaging system, the world’s largest beaver dam exists in a national park in nothern Alberta, Canada and measures almost 3,000 feet long. Apparently, it’s been showing up on NASA satellite images since 1990; and is estimated to have taken more than 20 years to build.
“[Beavers] are one of the few species that really leave a footprint on the Earth that is visible from satellite,” ecologist Jean Thie told CBC News in an interview in 2008.
Fortunately, the dam is located in an inaccessible part of the park — so don’t go asking Google for directions.
via CBC News