Explore how beavers build their impressive dams, and what impact
these structures have on the surrounding environment. --Nestled in
the forests of Canada sits the world’s longest beaver dam. This
850-meter-long structure is large enough to be seen in satellite
imagery and has dramatically transformed the region, creating a
pond containing 70 million liters of water. But dams of any size
can have huge impacts on their environment. So how exactly do
beavers build these impressive structures? Glynnis Hood
investigates.Lesson by Glynnis Hood, directed by Keegan
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