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[–] 6 points 2 years ago (3 children)

This is fascinating, but what's the evolutionary advantage of covering up the noise?

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  • [–] 47 points 2 years ago (1 child)

    Covering the noise is covering the running water. Covering the running water creates a dam. Creating a dam creates a pond. Creating a pond provides them with a nice controlled environment in which to build a lodge with an underwater entrance for protection from predators.

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