More than 200 years ago, a scroll damaged by the eruption of Mount Vesuvius was unrolled and pasted onto cardboard, even though it had writing on the back. New imagery shows some of what's hidden.

Left: Restored images of papyrus scrolls from Mount Vesuvius. Over 2,000 characters composing 15 lines of an ancient Greek scroll is now legible thanks to machine learning. Right: The scroll read ...