Regarding the "dark deep" - anyone who's dove more than a couple of meters deep knows the deeper you go the darker it gets. It doesn't take a genius to extrapolate from there.
Regarding the visibility of differing layers of temperature and salinity - I beg to differ. You can see them if the conditions permit.
I know both of these facts this because I've seen it with my own eyes.
No revelation required.
Regarding the visibility of differing layers of temperature and salinity - I beg to differ. You can see them if the conditions permit.
I know both of these facts this because I've seen it with my own eyes.
No revelation required.