The Earth was discovered to have a solid inner core distinct from its molten outer core in 1936, by the Danish seismologist Inge Lehmann, who deduced its presence by studying seismograms from earthquakes in New Zealand.
Descubriuse que a Terra tiña un núcleo interno sólido distinto do núcleo externo líquido en 1936 grazas aos traballos da sismóloga danesa Inge Lehmann, quen deduciu a súa presenza estudando os sismogramas de terremotos en Nova Zelandia.