If there's anything people need to be doing more of these days, it's thinking farther out there. Good job, and keep it up. Use your gut to determine whether or not it's too far out. Part of that is reading stuff like this for verification. A fine job has been done of bombarding us all with constant reminders that aliens couldn't possibly be among us, an dridiculing those who dare to think far out enough to accommodate that as a real possibility. Consider that when making up your mind.