Extraordinary Minds

Daniel Tammet has memorized the number pi into the tens of thousands of digits.  He's learned new languages in a few weeks.  He describes the gift - and the burden - of being an autistic savant.

Aubrey Ralph is an audio engineer and radio producer. He's also bipolar. Having a mental illness has made him acutely aware of how schizophrenics can shape and distort reality.

Some of the world's most celebrated scientists and artists have been dyslexic.  Cognitive scientist Maryanne Wolf says dyslexia can be a gift, but schools must learn how to teach dyslexics to read.