When people die, many things can be done with their bodies––embalming, cremation, donation to science and so on—but some people will choose to have their dead bodies, or parts thereof, frozen with the expectation that technology will advance enough to bring them back to life. Reactions, a video series from the American Chemical Society, breaks down the chemistry of cryogenic freezing and whether it’s realistic to think we could ever reanimate a frozen corpse, presenting the reasons the process is not tenable. http://2csa.us/iy. Read more about the differences between cryogenics and cryonics at https://cryogenicsociety.org/cryonics/