Water is Amazing and Necessary

There is nothing more pleasant than a cold glass of dihydrogen monoxide, even though it is often used as a solvent or to cut through rock. (Expensive alternative term for water there. Baffle your friends.) As anyone in searching for extraterrestrial life knows, water is essential. When put under tremendous pressure and tightly focused, waterjets cut through rock and metal. It is a solvent because it dissolves quite a few substances. Earth is mostly water, though most of it is not in drinkable form. The human body contains a large percentage of water. Small waterfall on river, Unsplash / Cowboy Bob Sorensen The three basic states of matter are solid, gas, and liquid. Interesting that there is a huge — indeed, yuge — range of temperatures in the universe, but water is only liquid within a few degrees. Earth has the right kind of star to let water exist in this important state. Water's specific heat characteristic helps keep the temperature of this blue marble rather steady. Oh yes...