Oh, and they also include appendices to the Bible, or a kind of director's cut that didn't make it into the version in your hotel room nightstand. These are of interest to Bible scholars because they clarify a few things that the modern Bible leaves ambiguous -- most notably why the hell God told Abraham to kill his son, just to stay his hand at the last second. According to the scrolls, it was due to a bet God made with the devil, which God totally won.
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"God actually has a pretty serious gambling problem."
Most importantly, though, the Dead Sea Scrolls provided Bible scholars with the ability to compare the modern Bible to the original version. The oldest version of the Bible prior to this discovery, the Leningrad Codex, was written in A.D. 1008, the result of 1,000 years' worth of Chinese whispers. Nevertheless, the scrolls show the modern Bible to be surprisingly accurate, or at least they have yet to reveal any mind-blowing errors, like that Jesus was actually a dog or something.
To this day, the goat herders who found the things probably still think the guy who bought them was a sucker for forking over 30 bucks.
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"Seriously, guys, the money is shit. Don't waste your time."