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$r = waitpid($pid, WNOHANG) and last;
$r = waitpid($pid, WNOHANG);
} while $r<0 and ($! == Errno::EINTR or $! == Errno::ERESTART);
last if $r;
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?
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