A 15-year-old Virginia high school student visiting Boston's Museum of Science uncovered a math error in the golden ratio at a 34-year-old exhibit.
Joseph Rosenfeld was visiting the museum on a recent family trip when he saw something that appeared wrong with the equation.
Joseph noticed minus signs in the equation where there should have been plus signs. He left a message at the desk and later received a letter from the museum's exhibit content developer, Alana Parkes, informing him the equation would be corrected.
Parkes wrote the mistake had been there for a "very long time'' without being noticed.
Joseph is a sophomore at John Handley High School in Winchester. He told Boston.com catching the error was exciting. He hopes to return to the state someday to attend the Massachusetts Institute of Technology.