There’s a scientific secret hiding in one of the most famous paintings of all time. It resides on the ceiling of the Sistine Chapel, painted by Michelangelo, as God gives Adam the first spark of life.

FALCON HEIGHTS, Minn. — A slow shuffle of people pass by works of art at the Minnesota State Fair. But around a bend, in the fair's Fine Arts Building, the movement stops as a crowd gathers in front ...