Earth’s day isn’t exactly 24 hours. The reason may lie deep inside the planet

Scientists may have solved why the length of Earth’s day changes by a few milliseconds over decades. Subtle shifts in the inner core appear to tug on the mantle, revealing a surprisingly dynamic world thousands of kilometers beneath our feet.

In Science, FlexChar puts this story at the center of the day: Scientists may have solved why the length of Earth’s day changes by a few milliseconds over decades. Subtle shifts in the inner core appear to tug on the mantle, revealing a surprisingly dynamic world thousands of kilometers beneath our feet. FlexChar is surfacing it because it is driving searches and conversation right now.