For as long as libraries have guarded their oldest manuscripts, the animal skins those documents were written on have quietly held a second archive — one written not in ink, but in DNA. Researchers at North Carolina State University have now found a way to read that archive without disturbing a single fiber, using the same gentle brush employed in routine medical screenings. Tested across 91 manuscripts spanning more than a millennium and three continents, the method transforms parchment from a surface that merely carries history into a biological record that lived it.