New York Times Magazine:

A team of Italian geoscientists published a paper called “Modeling the Failure Mechanisms of Michelangelo’s David Through Small-Scale Centrifuge Experiments.” That dry title concealed a terrifying story. The paper describes an experiment designed to measure, in a novel way, the weakness in the David’s ankles: by creating a small army of tiny David replicas and spinning them in a centrifuge, at various angles, to simulate different levels of real-world stress. What the researchers found was grim. If the David were to be tilted 15 degrees, his ankles would fail.

The seed of the problem is a tiny imperfection in the statue’s design.

The opening photo of this long article is fantastic. I saw David many years ago in Florence and was absolutely captivated by the statue.