The Enigmatic E Prime Layer: Water Leaking into Earth's Core

Scientists have discovered that the mysterious E' layer surrounding Earth's core is likely formed by water leaking down from the surface and reacting with the outer core's metallic surface. This reaction produces silica crystals, which are forced out of the liquid metal. The E' layer is a hydrogen-rich and silica-depleted layer, contrary to previous assumptions. The finding suggests a more dynamic interaction between the core and mantle than previously believed and raises questions about our understanding of these processes.