Fragments of the Dead Sea Scrolls long thought to be blank contain text that's invisible to the naked eye

https://edition.cnn.com/2020/05/20/world/dead-sea-scroll-hidden-text-scn-trnd/index.html

 For decades, fragments from the ancient Dead Sea Scrolls were stowed away at the University of Manchester, deemed largely worthless.

Yes, they were still significant as authentic fragments of the coveted scrolls have been hard to come by, but they were blank, and therefore, just scraps of paper.

Until now.

Researchers have found that four of the 51 fragments believed to have been blank do, in fact, contain readable Hebrew/Aramaic text. They just needed a special camera to see it.