The Earth's inner core is thought to be slowly growing as the liquid outer core at the boundary with the inner core cools and solidifies due to the gradual cooling of the Earth's interior (about 100 …

Jun 5, 2025 · Earth is divided into three main layers. The dense, hot inner core (yellow), the molten outer core (orange), the mantle (red), and the thin crust (brown), which supports all life …

Sep 17, 2025 · But despite its importance, many of the most fundamental properties of the core are unknown. We do not know exactly how hot the core is, what it is made of or when it began …

Sep 30, 2025 · Cartoon of the Earth with cutaway showing the mantle and inner and outer core. Magnetic field lines produced by the geodynamo extend into space and interact with the solar …

At the very center, with a radius of about 1,227 kilometers (762 miles) is the inner core – the densest part of our planet, a solid ball mostly composed of iron and nickel, comprising less …

Feb 10, 2025 · Located 3,000 miles below the Earth’s surface, the inner core is anchored by gravity within the molten liquid outer core. Until now the inner core was widely thought of as a …

Jul 21, 2025 · No drill has ever come close to piercing the Earth’s crust, let alone the mantle or the core. Yet through ingenious experiments, seismic readings, high-pressure simulations, and …

Feb 10, 2025 · Earth’s inner core is changing shape, scientists have found. The discovery resolves a long-simmering controversy about what’s happening at the heart of the planet — …

The transition between the inner core and outer core is located approximately 5,150 km (3,200 mi) beneath Earth's surface. Earth's inner core is the innermost geologic layer of the planet Earth.

Jun 24, 2025 · The Earth’s core is primarily composed of iron (Fe), alloyed with a significant amount of nickel (Ni), and trace amounts of other lighter elements. This metallic heart, …