. Can humans be their ancestors themselves? The remaining of the genetic legacy is the main topic in some thrillers, and the thing is that the firms like Cryonics institute are offering services, that persons can store their bodies in liquid nitrogen. Some of them are waiting for waking up when the technology is advanced so much, that their illnesses can cure. But things like genomes can also store in cryogenic conditions. The genomes can store in the form of cells, and the things like embryos can store in liquid nitrogen for a very long time. And that thing causes a question, can a human be themselves their ancestors? ------------------------------------------------------------------------------------- The answer is simple: there are two main ways which makes that thing possible even if there are no time machines: 1) The person would wake up from the cryogenic ice after a couple of generations and then marries their descendant. 1B) The person can be stored in the f...