One little thing I want to know though.  The reavers: you know how they put skeletons on the outsides of their ships? How do they reasonably do that?   I mean, when you look at those, they're just bones, fully rotted, no 'meat' on them, etc.  So what's holding the bones together?  I supposed it's meant to be a scary thing... just doesn't make sense how they do it.