https://www.nbcnews.com/news/world/...ies-are-first-ancient-bible-texts-be-n1261182 "...Using methods more likely to be seen in a Hollywood movie than in an archaeological project, researchers had to rappel down a precarious cliff face to reach the cave opening, which is 262 feet below a cliff top and flanked by gorges on either side. Drones were also used to survey hard-to-reach parts of caves...."