Eric Weihenmayer
May 19, 2011
Erik Weihenmayer went blind when he was 13 years old but new technology enables him to see with his tongue.
The BrainPort device gives him a sense of space and, together with a friend nearby, helps him scale Utah’s formidable Castleton Rock.
Inside the Human Body – Building Your Brain is presented by Michael Mosley and can be seen on BBC One at 9pm on Thursday 19 May 2011 and after on BBC iPlayer
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