Artist Salvador Dali is known for his surreal paintings and eccentric personalit. Creativity is akin to insanity, say scientists who have been studying how the mind works. Brain scans reveal striking similarities in the thought pathways of highly creative people and those with schizophrenia. Both groups lack important receptors used to filter and direct thought. It could be this uninhibited processing that allows creative people to "think outside the box", say experts from Sweden's Karolinska Institute. In some people, it leads to mental illness.