Recently on youtube, I was watching some BBC videos featuring David Attenborough. One video that I watched was about beavers. Beavers have a much more sophisticated system of engineering than they are given credit for. In the video, it is shown the tiny stream that they used to turn into a giant pond system that enables them to traverse through their environment and not be attacked by a bear or a mountain lion. They also extend their territory by digging tunnels that lead them to sources of food. For food, the beavers ingest wood from terrestrial plants and also aquatic plants. One interesting behavior they have is how they will bring back wood and keep it in a storage area underwater. Scientists call this their “fridge” and it allows them to be active throughout the winter, instead of having to hibernate. The beavers live in a structure that is built with such strength that it is impenetrable by a bear. During the winter, hot air can be seen flowing out the top of the snow covered lodge, just showing the insulative properties of the lodge.
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