In a remarkable example of natural engineering, beavers constructed a dam that filtered polluted water flowing into a protected area—achieving what local authorities had spent seven years planning but had not yet implemented. The animals unknowingly completed the project for free. The beaver dam slowed water flow, trapped sediment, and prevented contaminated runoff from spreading downstream. When officials inspected the site, they realized the dam accomplished the same environmental goals as a p

Sometimes called nature’s engineers, beavers go to remarkable lengths to make their homes. | REI

88 reactions · 19 comments | Turn it up to listen to this beaver family chatting during dinner. They communicate through grunts and whines. | Mike’s photos and videos of beavers | Facebook