A new study suggests the earth's inner core may have started spinning in the other direction. Terrific. A box in the late 3100 miles below the earth's surface, our planet's inner core can spend independently because it floats in the liquid metal outer core. Researchers in China analyzed seismic waves from repeating earthquakes over the last 6 decades. China, Josh. And said they discovered that the intercourse rotation quote came to a near halt around 2009, then turned in an opposite direction. What the hell would cause this? They believe the inner core rotates relative to the earth's surface back and forth like a swing, one cycle of the swing is about 7 decades, meaning it changes direction roughly every 35 years. What is happening in there? I don't know, but it's pretty wild.