in reply to convert ambiguous letters in a DNA sequence to all possible non-ambiguous letters
Also see section 4.3.2 "Genomic Sequence Generator" of Dominus's excellent Higher Order Perl available for free download here.
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 (572 votes). Check out past polls.