Agua. H2O…”Mad Max sounded hoarse today. She was sucking on a cough drop while she talked, and every few minutes she paused to sip from a tall yellow tumbler.“You all know the subject of today’s science concept in action as that clear fluid you’re stuck drinking when the vending machine is out of Gatorade. Scientists, on the other hand, know it as the most essential part of life next to the almighty atom itself: water. Two parts hydrogen, one part oxygen. All around me I see water—each of your bodies is sixty percent water; each of your brilliant brains is seventy percent water; our school mascot, the oh-so-inspirational plum tomato, is ninety-five percent water. Water is so important to the human body that while we can go a couple of weeks without food, we can only go a few days without H2O. You, my knowledge-thirsty young scientists, will be working with water in today’s experiment.”I groaned. Here I was, back on Gardo Glasses again and so incredibly thirsty that I could barely see straight, and Max assigns a water experiment.