The thing to understand about archaeology is that it's a science of destruction. The moment an ancient site is discovered, its physical condition immediately begins to deteriorate. Every dig removes a layer of the archaeological record that can never be replaced, and once humans are allowed to visit, with their hot breath and sweat and backpacks, walls start crumbling, pigments start flaking, and before you know it the site has to close down to "rest," or close for good—a victim of its own celebrity.

Now, a practice is gaining traction that may save us from inadvertently wrecking the very cultural treasures we most want to see: the creation of high-tech copies of ancient archaeological sites. We're not talking sized-down Las Vegas