In 2015 in northern Minnesota, a Lake emptied after the collapse of a dam built by Beavers. Rodents did seven years to build this dam, elevating 0,5 meter per year to reach over 3 meters in height.

The dam finally fell and the lake emptied in 4 hours. Only six weeks after, beavers had already begun rebuilding a new dam has already reached 2 meters high.

1 Comment

1. dimitris81 says:

   31/10/2016 at 16:34

   It seems that they are more experienced now and going 'on the train'. Unless they are much more narrow or that have proliferated , i.e. more working teeth..

   

   

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