A neurologist who, according to scientific consensus, should never have been able to see in three dimensions "rewires" her brain and learns to see the world in three dimensions. New eye-tracking technology allows artists to “draw” with their eyes when unable to do so with their hands. Even something as comparatively mundane as learning a new language can expand the depth and texture of your perception. Wish you could read someone's mind? See with X-ray vision? The technology exists for that too. Today we're examining the power of the human brain, asking, What can happen when we believe that anything is possible?