[Lurkina.n.Learnin]

Seems like it would cool from the outside in not vice versa.

[BenLurkin]

I think its solid because of the high pressures on it, but hopefully some edumacated FReeper can clarify that.

[Little Pig]

It is. Since the outer core is more liquid, as it cools it precipitates material which (being denser) then “rains” down to the solid inner core. It sounds weird, but only if you’ve forgotten that pressure and temperature can be interchangeable.