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$y = 2013;
($y = join('',sort(split(//,$y)))) =~ tr/0-9//s;
print "unique digits: " . length($y) . $/;
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 (478 votes). Check out past polls.