Back in American "mountain man" times, beaver hides were in demand for top hats in England. Beavers in America were hunted and trapped nearly into extinction. When the top hat went out of style, the demand for beavers dropped accordingly. People quit hunting and trapping beavers and the specie made an amazing come-back. Now we are seeing beaver dams once again.
The beaver is a very good engineer when it comes to dam building. Without a computer, an engineering degree, or building tools, they build an effective water dam. Just a few limbs, sticks, twigs, and some mud, and they have themselves a dam.
Not bad!!
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