This was Cave 1, where the first scrolls were found. A Bedouin shepherd was looking for a stray sheep, and one of their common techniques is to throw a rock in the sheep's direction - the sound startles the sheep into coming back toward the shepherd. So he threw a rock up into that cave, and heard the clang of pottery! That was one of the urns that the scrolls were stored in.

There were 11 caves in all, yielding 900 manuscripts, including a commentary to Habbakkuk, all of Isaiah and an Essene instruction manual for living. If you've ever wondered (like I have), the Scrolls were a significant find because they taught us a lot about the context of Scripture - the culture of how people lived just before Christ. They also gave a lot of validity to the texts we already had. And they confirmed that prophecies about Christ (so many in Isaiah!) really were made before His time - no one can say we made the prophecies up after Christ, to make Him look like the expected Messiah.