in reply to Object-oriented Reengineering Patterns book now available as a free download
See also jdporter's Survey of POOP Modules (draft; please do not vote or reply).
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 (510 votes). Check out past polls.