By the time a supernova kills us, assuming we exist for that amount of time (I believe that is in 5 billion years, correct?), I SINCERELY hope humanity has gained the ability to establish colonies in different solar systems and such, or even create planets for crying out loud. I doubt the sun going out will be what kills us because by that point we probably won't even be on Earth anymore, but there is still a point in time where the entire universe will probably go dark, but maybe we will be able to create our own stars, heh.