Earth’s inner core less solid than previously thought — USC News

'New hidden world' discovered in Earth's inner core

Scientists are probing the secrets of Earth’s inner core—and how it saved life on our planet

The Three Layers of the Earth | Crust, Mantle & Core

The three interior layers of the Earth: the crust, the mantle, and the core | Britannica

What is Earth’s inner core and why do scientists want to study it?

Earth's Layers: Crust, Mantle & Core, Seismic Discontinuities - PMF IAS

Chinese research finds Earth’s inner core may have paused, or even reversed, as part of 70-year cycle