Cryogenics is a branch of physics (or engineering) that studies the production of very low temperatures (below −150°C, −238°F or 123K) and the behavior of materials at those temperatures. Cryonics is the nascent technology of cryopreserving humans and animals with the intention of future revival. Unlike cryogenics and cryobiology, cryonics is not an established science and is viewed with skepticism by most scientists and doctors today (although there are many scientists involved in cryonics[1]). As a technology, cryonics seeks to apply the results of many sciences, including cryobiology, cryogenics, rheology, emergency medicine, etc.