In the third part of my series on how to transform the brain into a powerful Virtual Reality Machine, I discuss the ability to enhance your powers of hearing the world around you. I consider some of the pitfalls and introduce you to a blind man who is also a mountain biker, explaining how he has turned his ears into the equivalent of eyes, ‘seeing’ the world through listening by means of what he terms his ‘flash sonar’.
The Mind Changers 