I was having a discussion with one of my professors the other week about human exploration of space. He said that the only reason for continued manned exploration and settlements on other planets would be if we were to find signs of life on another planet like Mars. I disagree, I believe that even with no signs of extra-terrestrial life we should continue to push out into space. I guess I believe that exploration is reason in itself to explore and that it is a Manifest Destiny for a new age that we do explore and eventually settle in and outside of our solar system. Just wanted to see what everyone else thought about this.