Look out there. Can you feel them? Incredible to think - other human beings out there. You strain your eyes the whole day long, see nothing, hear nothing, still can't believe it somehow - but know it's true. Other warm bodies, hearts pumping blood. That ought to make us feel less lonely, or safer, it seems. Then why is it so shocking? Because - they don't belong here. The possibility of life in this place is more terrifying than the place itself. Can it be that we're really here?