 And from the Tech File, preserving your body to be resurrected in the future. It sounds like science fiction, but organizations want to make it a reality. Fox on Tech. Is life after death possible? The folks behind Cryonics say, maybe so. Here's how it works. Shortly after death, your blood is pumped full of medical-grade antifreeze, and your body is suspended in liquid nitrogen at negative 196 degrees. The cost starts at about 30 grand.