Earth’s inner core actually wobbles like a pendulum 🌍🌀 Recent seismic studies reveal that the solid inner core doesn’t spin at a constant speed — it oscillates back and forth over time, shifting its rotation relative to the rest of the planet. #science #geology #earthscience #research #innovation #TechFactsHub | Factspedia

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

Uh, Earth’s Inner Core Just Stopped Spinning