A North Carolina State University faculty member and creator of the popular website “How Stuff Works” has died.

Marshall Brain died inside his office Wednesday on N.C. State’s centennial campus.

While the university would not confirm any details related to his death, sources close to Brain said he died by suicide.

The N.C. State Police Department said it is no longer investigating, and foul play is not suspected.

Brain contributed several articles to WRAL.com over the years, including an editorial piece. He’s also author of “The Doomsday Book: The Science Behind Humanity’s Greatest Threats.”

If you’re having suicidal thoughts or a mental health crisis, call or text 988 or call the National Suicide Prevention Lifeline at 800-273-8255. Veterans can press “1” after dialing 988 to connect directly to the Veterans Crisis Lifeline. For texts, veterans should continue to text the Veterans Crisis Lifeline short code: 838255.