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Denna sidan visar ordspråk som liknar "We haven't been sure of the same thing about bats, because in the dark, they rely primarily on a sophisticated sonar system - called echolocation - which is quite different from the way we sense the environment. To test the bat's echolocation system, we removed sources of light, mimicking a very dark night, when bats would rely completely on sonar to forage for food.".