The 4th Phase of Water

Solid, liquid, and gas—these are the three states of matter presented in the home-schooling science curriculum I was preparing to review with our 7-year-old daughter. The best example to learn these states is water in its different forms: moisture vapor in a cloud, liquid rain, and solid ice. I couldn’t stop there though, not when the intersection of biology and physics tells of a truly amazing fourth state of water that may be the key to life in the animal kingdom.