BBCnews is carrying this article summarizing a new expidition exploring a pyramid at Mexico's Teotihuacan. By using, get this, muon particle detection gear, it is hoped scientists can determine if there are any large, undiscovered voids inside. These voids would, if large enough, be a strong indication that the kings that built the pyramid are still buried somewhere inside.

I always find it amazing we use extreme high tech to explore the remains of people who didn't even know about the wheel. Historical bookends, if you will.