Beneath the spine of Italy, Earth is quietly undoing itself in a way that geologists have long struggled to name. Researchers at the University of Florence have identified a process called delamination — the slow peeling of the dense lower crust away from the upper crust — unfolding along a 500-kilometer front that migrates like a zipper hinge toward the Adriatic. The Apennine Mountains, long a source of geological contradiction, now appear to be a rare living window into the planet's interior mechanics, offering science something it seldom receives: the deep past happening in the present.