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$foo = $bar;
$foo .= $baz;
foo = bar;
foo += baz
foo = foo + baz;
foo << baz;
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 (469 votes). Check out past polls.