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Blind people can 'see' with their ears

Blind people can learn to "see" like bats by listening to echoes, a study has shown. By making clicking noises with their mouths, they can interpret the echoes to make sense of their environment. A few are so adept at the skill that they use it to go mountain biking, or play ball games.

Scientists in Canada found from scans that the echoes are processed using the visual part of the brain, rather than the auditory region.