(1) Biological life colonizing other planets? The individual beings would not live long enough to make the journey. So, would have to have reproduction of gen

(1) Biological life colonizing other planets? The individual beings would not live long enough to make the journey. So, would have to have reproduction of generations during the trip, and that means one heck of a big spaceship. Then for any of the motivations, I would be easier just to stay home. (2) Sending self-reproducing robots? Why? What's the motivation? E.g., why should I consent to spending big tax bucks to send robots out that would need millions of years to have any effect back on earth? I won't. Okay, there is the scenario that a planet is ready to die, and the beings want to move to a new land. Again, for anyone alive, what is their motivation? That is, either stay home and wait for, say, the star to nova or just die on a long space trip? Just stay home; as bad as a star nova would be, just stay home. One more scenario is that fast space travel is possible but uses physics we don't understand and, thus, can't detect.