“One cold Minnesota winter night, as I trudged out to my backyard sauna, I realized that one of the water containers we use to dump water over our heads was left outside, full of water from a sauna a couple days previous. It looked frozen solid. Sitting on the sauna bench, I dumped out the chunk of ice and noticed that the center was unfrozen. I poured out the liquid center and what remained was a perfectly formed drinking glass.”