Eventually, assuming we survive that long, we will face the problem of the Universe's "big crunch" or "big freeze" (if you care to use those terms...). So what possible action could we take when we reach that point? I realize we aren't anywhere near the level of technology we would need to be at to actually do anything, but surely we can come up with some decent ideas. Can we somehow prevent it from occurring? If not (or if we don't want to), can we get through it in some way? What do you think, realisticly, we could do (at some point there will be billions of scientists crawling over this problem like crazy, let's get a head start :P)?