i compared this horse to a horse natalithat that leonardo de vent convenient -- de vinci. there are many mozart. to be a great composer, many kids start composing at a very early age. three, for, five. mathematicians can start early. but pa caus piccasso claimed you couldn't get a sense until you were nine, 10, 11 years old. he could not draw a horse like that when he was five years old. the fact they are compromised in some ways kids with autism can have remarkable strength. i think that supports a point that is emerging in a number of these programs that howard gardner has made, that there are multiple intelligences. you can be strong in some things and weak in others and conversely you can have serious compromise of function and do exceedingly well. that probably holds for the two of us. >> charlie: this is charles darwin's book, the expression of the emotions in man and animals. darwin was amazing. >> amazing man. he was without a doubt the most important biologist who ever lived. he not only formulated the theory of evolution but he realized that behavior evolved. jus