Scientists Uncover Reason for Millisecond Changes in Earth's Day Length

Researchers may have solved the long-standing mystery of why the length of Earth's day fluctuates by a few milliseconds over decades. Subtle shifts in the planet's inner core are believed to gravitationally tug on the mantle, revealing a surprisingly dynamic world thousands of kilometers beneath our feet. This discovery offers new insights into the Earth's deepest interior and its rotational dynamics.