in reply to The greatest source of my XP is:
Mostly, because only lower levels get that bonus, see Levels of Monks.
Seems you have too much XP already. Downvoting enough posts may be able to fix that ;-)
There is no Extraterrestrial life
There aren't any suitably capable Extraterrestrials
Interstellar travel is too difficult
We're too uncool / not worth the trouble
What do you mean they haven't visited?
Results (501 votes). Check out past polls.