Compact, juicy, and colorful, cherries are nicely supplied with nutrients, notably pectin (a soluble fiber that helps control blood cholesterol levels), vitamin C, and beta-carotene, with some potassium. (Sour cherries, which are sometimes called "pie cherries," have considerably more vitamin C than sweet cherries do, though much of it is lost when the cherries are cooked.) Cherries are also high in a number of phytochemicals, including: anthocyanins (pigments responsible for the red and blue colors of fruits and vegetables), which may have anticancer properties based on their antioxidant activities that defend cells against harmful carcinogens); and quercetin, a so-called flavonoid, which is an antioxidant and may have both anticancer potential as well as anti-inflammatory and antihistaminic properties. It is this anti-inflammatory activity that has made cherries (specifically cherry juice) of interest to people who suffer from gout. There's even a possible dental health bonus in that studies have shown that a substance (not yet identified) in cherry juice may help prevent tooth decay. Although some people find the cherry pit an annoying feature, their only other shortcoming is their brief season, which lasts less than 3 months. But during that time, they are in abundant supply. Cherries are grown successfully in commercial quantities in only 20 countries, and the U.S. is one of the leading producers. Seventy percent of the cherries produced in the U.S. come from four states: Washington, Oregon, Idaho, and Utah. In physical science, freezing or solidification is the process in which a liquid turns into a solid when cold enough. The freezing point is the temperature at which this happens. Melting, the process of turning a solid to a liquid, is almost the exact opposite of freezing. All known liquids undergo freezing when the temperature is lowered enough, with the sole exception of liquid helium, which remains liquid at absolute zero and can only be solidified under pressure. For most substances, the melting and freezing points are the same temperature, however, certain substances possess differing solid-liquid transition temperatures. For example, agar melts at 85 Â°C (185 Â°F) and solidifies from 31 Â°C to 40 Â°C (89.6 Â°F to 104 Â°F); this process is known as hysteresis.