We, the inhabitants of the planet Earth, at some point, can face with the problem, which will force us to leave native planetoid. Problems on the way to other planets are many, chief among them — distance and time. Cryogenic sleep or other ways to slow the metabolism for long flights to the stars shown in the mind-blowing films, apparently, can become a real necessity in order to leave outside the solar system. And now that we have some way to genetically influence the function of the body, it is completely, you might find that by the time of interstellar travel the concept of "public lands" may be a very good change.
Space, celestial bodies, astronomy