Source: Power Line TWIP
I can't do unrelieved gloom-and-doom, this makes me happy.
The cartoon is charming whimsy but I could show you a half dozen beaver dams within 20 miles of my WY home. They are very serious constructions maintaining a water level as much as 2 feet higher on their upstream side. You or I would be hard pressed to accomplish what beavers do routinely using sticks, mud and instinctual programming.
