Canada's Wood Buffalo National Park
A Canadian ecologist has discovered the world's largest beaver dam in a remote area of northern Alberta, on the southern edge of Wood Buffalo National Park.
The beaver dam (an animal-made structure) spans about 2800 feet and so large it is visible from space.
Several generations of beavers have worked on the dam since the mid-1970s and it's still growing. Average beaver dams in Canada are 10 to 100 meters long, and only rarely do they reach 500 meters.
To find out more about this unique phenomenon and how it was discovered, read on ....
photo credit: Discovery News