The Earth holds several layers within, including an inner core and a potential even more inner core.
According to Australian National University geophysicist Joanne Stephenson in 2021, "Traditionally we've been taught the Earth has four main layers: the crust, the mantle, the outer core and the inner core." This understanding highlights the layered structure of our planet. The existence of another "more inner core" suggests ongoing discoveries and increasing complexity in our understanding of Earth's deep interior.
