This document discusses the possibility of cryonics, which aims to preserve the human body at death using cryogenic technologies with the goal of future revival. It notes that around 250 people have been cryopreserved in the US so far, with 1500 more making arrangements. The document explains that cryonics involves vitrifying the body rather than freezing, and cites a study where scientists successfully revived a rabbit by transplanting a vitrified kidney.