Cryogenics is the study of materials and their behavior at extremely low temperatures, typically below -150°C (-238°F). The field of cryogenics deals with the production, use, and effects of very low temperatures on various materials, including gases, liquids, and solids. Cryogenics has a variety of applications in science and industry. For example, it is used to study the properties of materials at low temperatures, to store and transport biological samples, and to cool electronic devices, such as superconductors. Cryogenic techniques are also used to produce and store liquefied gases, such as liquid nitrogen and liquid oxygen, which have a variety of industrial and medical applications. Cryogenics has also been explored for potential applications in space travel and exploration, where the extreme cold temperatures of space could be used to preserve materials and equipment over long periods of time. Overall, cryogenics is an important field that has many practical applications in various industries, and it continues to be an area of active research and development.