I love all of the finds, which bring up more questions. And, I would like to see them all answered. When the time line was shown, I was amazed at how far back it goes (1100). I have an idea, now that there are two shafts drilled into the void, why not drop a sonar emitter down each shaft. It should give you an almost 3D image of the void. Giving you shape and location of what's in the void. I've enjoyed the show immensely and look forward to next season.