Many scientists had initially expected that the inner core would be found to be homogeneous, because the solid inner core was originally formed by a gradual cooling of molten material, and continues to grow as a result of that same process.
Moitos científicos esperaban inicialmente que o núcleo interno fose homoxéneo, porque o núcleo interno sólido se formou orixinalmente por un arrefriamento gradual de material fundido, e continúa crecendo como resultado dese proceso.