To journey across the stars requires voyages of centuries or more, ensuring the crew will be long dead by the time they arrive. If you want your crew available to colonize new worlds after their interstellar voyage, you either have to extend their lives, train their descendants, or freeze them till they arrive. We will examine the third option day, freezing people with cryonics, using hibernation, or suspended animation, or some other form of stasis the future might offer.