At the basic research level, we are interested in understanding the properties that make water so unique and the molecule without which life is impossible. At the center of interest is the idea that liquid water as we know it is actually a mixture of two different liquids (HDL and LDL). At very low temperatures and under pressure, we are able to separate and isolate these two. We study the physical and chemical properties of HDL and LDL individually, such as density and heat capacity, or how they differ in terms of solubility or chemical reactivity.