Polite (pronounced PO-leet) Stewart has been advanced for his age from a very young age.
Polite was just three when his father, frustrated with how often his son was getting sick at pre-school, decided to he'd try home school until Polite was old enough for first grade.
Problem was, Polite's father did too good a job.
By five, Polite was reading and doing math at a fourth grade level.
He hasn't slowed down since.
Now at the age of 19, Polite is done with his undergraduate studies and working as a post-baccalaureate fellow at Lawrence Berkeley National Laboratory.
He says he's ready to shed the image of a science prodigy and is viewed simply as a scientist.
While he thinks it's about time to leave behind the subject of his age, he was willing to talk about it one more time with NBC Bay Area's Garvin Thomas.
Watch his story above.