Key Takeaways on Earth's Inner Core Earth's inner core is solid and blistering hot. For decades, scientists have known ...

The inner core is about 9,400 F (5,200 C) — about as hot as the surface of the sun — but tremendous pressure keeps it mostly solid. Inside the inner core is the innermost core, a 450-mile-wide ...

Two Australian scientists argue in a new paper that within the Earth’s core, based on measurements of waves reverberating along the Earth’s diameter, is an innermost inner core, about 800 ...

The mapping shows there isn’t a homogeneous inner core, but one that has evolved differently in various spots. The team believes that this shows the trapping of liquid iron inside the solid core.

Earth's inner core is a solid ball of mostly iron and nickel.Measuring about 1,520 miles (2,440 kilometers), this inner core spins inside the outer core, an ocean of molten iron and nickel about ...

It is true that the outer core generates electrical currents that sustain the planet’s magnetic field, but Vidale says shifts in the Texas-size inner core are too minuscule to have an impact.

Something is happening inside the Earth, scientists say. A new study has seen scientists unexpectedly find that the inner core of our planet is changing its physical nature ...

The inner core, spanning about 760 miles in diameter, primarily consists of iron and nickel. Despite extreme temperatures, the inner core remains solid due to immense pressure at its center.

Scientists say they’ve confirmed Earth’s inner core has been slowing down. Here’s what it could mean — and why the topic has been the subject of fierce debate.

Scientists first had a hunch that the inner core was moving in the 1990s, he said. It has taken years to back up that theory with hard evidence, mainly because of the difficulty of studying a mass ...