Deep Inside Earth, a Spinning Iron Ball is Changing the Length of Our Days!

Deep beneath our feet, Earth's giant inner core [a solid metal ball] has started to spin a tiny bit slower and tug on the rest of the planet. This amazing tug-of-war actually changes how long our days last by a fraction of a second! Isn't it wild to think that a giant spinning ball in the center of the Earth decides when it's bedtime?