Aiming to the side

The best way to track a moving object with a flashlight might be to aim it to one side, catching the object in the edge of the beam rather than the centre. New research at the Weizmann Institute of Science reveals that bats, which 'see' with beams of sound waves, skew their beams off-centre when they want to locate an object. The research, which recently appeared in Science, shows that this strategy is the most efficient for locating objects...

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