PALO ALTO, Calif. (AP) – A one-time Bronx high school student who became a Stanford University professor, won a Nobel Prize in physics and founded a pioneering Internet company has died at age 73.

Melvin Schwartz, who shared a Nobel Prize in 1988 with Leon Lederman and Jack Steinberger for their research into subatomic particles, died Monday in Twin Falls, Idaho, after a long struggle with Parkinson’s disease, Stanford spokesman Neil Calder said Tuesday.

Schwartz, born in New York in 1932, became fascinated by physics when he was 12 and attended the Bronx High School of Science. He majored in physics at Columbia University, where he became a physics professor in 1958 before transferring to Stanford in 1966.

He taught physics at Stanford for 17 years until 1983, when he left to found Digital Pathways, which designed computer security systems and later was sold to a larger Silicon Valley company.

Schwartz remained a consulting professor at Stanford until 1991, when he returned to Columbia as a professor and associate director for high-energy and nuclear physics.

After he retired in 1997, Schwartz and his family moved to Ketchum, Idaho, where he lived until he became ill and entered a nursing home in Twin Falls.