Craig J. Fennie (; November 6, 1971 – June 14, 2026) was an American scientist. He was a professor at the School of Applied and Engineering Physics at Cornell University in Ithaca, New York. Fennie was a physicist and materials scientist. He is best known for winning a MacArthur Award in 2013.
Early life Craig Óg grew up in working-class neighborhoods of Philadelphia (Olney and NE) and attended Archdiocese primary (Incarnation of our Lord, known as "Inky") and high school (Archbishop Ryan High School). He took nearly a decade off before going to graduate school. During this time he was in an Irish-American punk band and worked several jobs including being a bouncer.
His family came from Tír Eoghain, Tuaisceart Éireann, near Loch Neagh. His father (Craig Mór) was a steamfitter, originally from Lackawanna, NY. His mother is from Minersville, PA.
Work Fennie's work combined elements of physics and chemistry in order to invent new materials with desirable properties.
Death Fennie died of a heart attack on June 14, 2026, at the age of 54.
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