>Ok, thats interesting, do you know of the relationship between the inner
core
>and the outer core?
The inner core is a solid apparently because of the enormous pressure it's
under. It's made of the same stuff as the outer core. Exact details of the
inner core structure aren't entirely clear because the pressures and
temperatures exceed our current experimental limits. I believe the current
theory is that the inner core is an iron crystal, which you just can't
get under conditions at the surface.