New Study Finds That Earth’s Core Wobbles on Its Axis Every 8.5 Years
The Earth spins around an axis that is roughly vertical, and as it spins, we move through day and night. When the seasons change, the angle of the axis also moves. But occasionally, something strange can be observed. Some days are ever so slightly longer or shorter than others. Similarly, tracking the motion of Earth's pole, scientists have long observed slight shifts in its location once every 8.5 years.













































































