Does the metal in the solid core of a rocky planet have any special properties?https://www.reddit.com/r/askscience/comments/11zbuiw/does_the_metal_in_the_solid_core_of_a_rocky/
Earth's inner core - Wikipediahttps://en.wikipedia.org/wiki/Earth's_inner_core
Earths Core - Full Science Documentaryhttps://www.youtube.com/watch?v=tvP2f_ADQvo
Earth’s inner core has slowed so much it’s moving backward, scientists confirm. Here’s what it could mean | CNNhttps://www.cnn.com/2024/07/05/science/earth-inner-core-rotation-slowdown-cycle-scn/index.html
Earth’s inner core may be reversing its rotationhttps://www.sciencenews.org/article/earth-inner-core-reverse-rotation