Earth's inner core, a hot iron ball the size of Pluto, has stopped spinning in the same direction as the rest of the planet and might even be rotating the other way, research suggested on Monday.
This color image of Earth was taken by the Earth Polychromatic Imaging Camera , a four megapixel CCD camera and telescope. The red, green and blue channel images are used in these color images. Photo: NASA.govEarth's inner core, a hot iron ball the size of Pluto, has stopped spinning in the same direction as the rest of the planet and might even be rotating the other way, research suggested on Monday.
Seeking to track the inner core's movements, new research published in the journal Nature Geoscience analysed seismic waves from repeating earthquakes over the last six decades. They said it previously changed direction in the early 1970s and predicted the next about-face would be in the mid-2040s. Experts not involved in the study expressed caution about its findings, pointing to several other theories and warning that many mysteries remain about the centre of the Earth.
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