Cryonics is the process of cryopreservating of a body to liquid nitrogen temperature to stop the natural decay processes that occur after death. Those practicing cryonics hope that future technology will allow the legally dead person to be restored to life when and if science is able to cure all disease, rejuvenate people to a youthful condition and repair damage from the cryopreservation process itself. , there were over 150 people in some form of cryopreservation at one of the two largest cryonics organizations, Alcor Life Extension Foundation and the Cryonics Institute.