naturealmanac.com

R7pl1 TIL that beavers build dams because they hate the sound of running water. A researcher set up speakers that played the audio of running water in multiple beaver populated areas, and the next morning found them to be covered in layers of sticks and mud.
4lMw TIL: A researcher set up speakers playing the sound of rushing water in a calm pond and beavers repeatedly covered the speakers until they couldn’t hear the sound anymore.