Inge Lehmann was a seismologist and geophysicist who discovered that the Earth has a solid inner core and a molten outer core.
Inge Lehmann, Seismologist and geophysicist
Inge Lehmann, Seismologist and geophysicist
Inge Lehmann, Seismologist and geophysicist
Inge Lehmann was a seismologist and geophysicist who discovered that the Earth has a solid inner core and a molten outer core.