I honestly believe the reason why we need another planet to live on is because we have ruined our own planet, and what if we do the same to the others. We have ruined our own planet from global warming, and we continue to do so. The problems we have now is because of our own decisions.
If there was life out there in the galaxy wouldn’t we know of it. No one knows how big space is and what is beyond our galaxy. If we were to travel into another galaxy how do they expect us to live that long. Like in