Liquid Crystals are remarkable chemical compounds that exhibit properties of both solids and liquids. The molecules react to heat and electrical stimulus to flow like a liquid and arrange like a solid, changing their optical properties. The three states of matter to which every foundational chemistry class introduces us -- (solid, liquid, and gas) -- turn out not to be as strictly delineated as we once thought.. Liquid crystals are both solid and liquid. Molecules that make up a solid are arranged in a fixed pattern and molecules in a liquid move freely, molecules in a liquid crystal will tend to point in a particular direction, but not with the uniformity of a solid. The predictability of these molecular fluctuations in the presence of electricity and heat allows liquid crystals to be used in an array of technical applications. This video shows liquid crystals cooling after being melted. Field-of-view is 3mm.