This was reported by Yahoo News, Ukrinform reports.

It is noted that this “planet within a planet”, located at a depth of 5,000 kilometers from the Earth’s surface, can rotate independently because it floats in a liquid metallic outer core.

The study’s authors, Xiaodong Song and Yi Yang, found that the rotation of the inner core “nearly stopped around 2009 and then started to rotate in the opposite direction.”

“We believe the inner core rotates back and forth like a seesaw relative to the Earth’s surface. One cycle of the swing takes about seventy years. So it changes direction approximately every 35 years,” he said.

According to them, the core had previously changed its direction of motion in the early 1970s, and the next turn in its motion will occur in the mid-2040s.

At present, there is little evidence that the “behavior” of the Earth’s core strongly influences those living on Earth. However, researchers believe there are physical connections between all layers of the Earth, from the inner core to its surface.

As reported by Ukrinform, the UN’s Scientific Evaluation Commission of the Montreal Protocol on Substances that Deplete the Ozone Layer stated that Earth’s ozonosphere could recover within forty years.