World’s biggest beaver dam discovered in northern Canada

Agence France-Presse: A Canadian ecologist has discovered the world's largest beaver dam in a remote area of northern Alberta, an animal-made structure so large it is visible from space. Researcher Jean Thie said Wednesday he used satellite imagery and Google Earth software to locate the dam, which is about 850 metres (2,800 feet) long on the southern edge of Wood Buffalo National Park. Average beaver dams in Canada are 10 to 100 metres long, and only rarely do they reach 500 metres. First ......

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