One area of study that still needs to be done is the kind of autism where kids have speech and they lose it. Some parents say it's happened right after vaccines. That group needs to be studied separately from others.

I think the mild Aspergers have always been there. You see, Asperger's diagnosis did not become common in the U.S. until the early '90s. And an Aspergers has more or less normal speech development and they've always been here, that hasn't changed. I can think back to when I was in high school, this is 40 years ago, I could name kids in my high school class and college class that, today, would be diagnosed as Aspergers.

The thing about being autistic is that you gradually get less and less autistic, because you keep learning, you keep learning how to behave. It's like being in a play; I'm always in a play.

If you get a little kitty and he's down on the bottom, and he's laying on his chest, you know tucked up underneath, then that cat is not relaxed.

You take somebody - one person has definitely got autism, you got another person that maybe has some of those traits and maybe there's some anxiety, depression, some epilepsy or something in the family history. Put them together, you're more likely to have a severely autistic kid than if you don't have any neurological problems in the family history.

If you see a child with autistic-like behaviors at age two and three, the worst thing you can do is just let them sit and watch TV all day. That's just the worst thing you can do. You need to have a teacher working with that child, working on teaching language, working on social interaction, working on getting them interested in different things, and keeping their brain connected to the world.

What would happen if the autism gene was eliminated from the gene pool? You would have a bunch of people standing around in a cave, chatting and socializing and not getting anything done.