Cryogenic sleep is usually the stuff of science fiction, most recently featured in the award winning blockbuster Interstellar. Of course, the most epic display of cryosleep can be found in Alien, in my humble opinion. Nevertheless, the theme is the same: cosmic voyagers are suspended in a sort of low metabolic state where vital functions are kept to a bear minimum by cooling the body, while not actually killing the person. It’s quite useful, especially when you consider interstellar travel involving years, decades or even perhaps centuries of traveling. It’s no wonder then that NASA is interested in actually turning this into a real-life application.