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William Maillis is not your typical 9-year-old. The boy from Penn Township, Pennsylvania  graduated from high school and is now among one of the youngest people ever to attend college.

William’s parents told the Post-Gazette they knew he had a gift when he was just a few months old. His dad recalls him speaking in full sentences when he was just 7 months old, telling him, “I don’t want to” when told to lie down in his crib, then saying “I want milk.”

His dad, Greek Orthodox priest Peter Maillis, said when William was 21 months old he was doing multiplication. By age 2, he was reading books and writing his own nine-page book. By 5, he read an entire geometry text book in one evening and retained everything. By 7, he was learning trigonometry and by 9 he was taking high school calculus classes.

He graduated  from Penn-Trafford High School earlier this year and was invited to enroll at Carnegie Melon University. His parents decided it would be best for William to ease into a full college course load, so he enrolled at Community College of Allegheny.

He plans to start at Carnegie Melon next year.

William told People magazine he aspired to become an astrophysicist to study the origins of the universe.

“I want to prove to everybody that God does exist,” said William, “by showing that only an outside force could be capable of forming the cosmos.”

William has the IQ of a genius, according to an Ohio State University psychologist. But other than that, he’s a normal 9-year-old.

“We’re normal people,” Maillis told the Post-Gazette. “And he’s a normal kid. You can’t distinguish him from other 9-year-olds. He likes sports, television shows, the computer and video games like everyone else.”