Scientists at the University of Southern California made a surprising discovery about the inner core, which was previously thought to be completely solid. Contrary to popular belief, it turns out that this core located 4,800 kilometers deep inside the Earth is entirely liquid. To reach the Earth’s inner core, one would have to descend to a depth of approximately 4,800 kilometers. This journey involves passing through various layers with different densities. However, a surprise may be encountered when reaching the inner core. Until now, it was believed that the inner core was completely solid. However, new research has revealed that the outer layer of the inner core is much softer and partially liquid than previously thought. Scientists from the University of Southern California in Los Angeles reached this conclusion and published their findings in the scientific journal Nature Geoscience. The Earth’s innermost core is a compact and solid structure composed largely of nickel and iron. It is subject to pressures of 3.64 million bars and temperatures of approximately 6,000 degrees Celsius. This inner core is surrounded by the outer core. The outer core is liquid and mainly consists of a mixture of molten nickel and iron. It moves with the rotation of the Earth and is in a constant state of flow. However, the inner core also moves and rotates around its own axis. This rotation is sometimes subjected to measurable fluctuations, sometimes speeding up and sometimes slowing down. This can also affect the length of days. The exact cause of these fluctuations has not yet been fully explained. New research may help explain this mystery. The outer layer of the inner core being much more viscous and softer leads to increased interaction with the liquid outer core. Additionally, this soft layer is constantly changing. Sometimes it spreads more into the liquid outer core, while at other times it adheres more tightly to the inner core. The turbulent movements of the outer core may play a decisive role in the behavior of the inner core.