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06.07.2026 - 01:20 [ LiveScience.com ]

Earth‘s Inner Core Shouldn‘t Technically Exist

(February 9, 2018)

„Everyone, ourselves included, seemed to be missing this big problem,“ study author Steven Hauck, a professor of Earth, Environmental and Planetary Sciences at Case Western Reserve University in Ohio, said in a statement. Namely, they were missing „that metals don‘t start crystallizing instantly unless something is there that lowers the energy barrier a lot.“

In chemistry, this extra energy is known as the nucleation barrier: the point at which a compound visibly changes its thermodynamic phase.

(…)

In their paper, the researchers proposed one possibility: Perhaps a massive nugget of solid metal alloy dropped from the mantle and plunged into the liquid core.

25.04.2024 - 23:52 [ IFLscience.com ]

The Earth’s Magnetic Field Is At Least 3.7-Billion-Years Old, New Evidence Shows

The age of the Earth’s magnetic field remains under question in part because we don’t fully understand what causes it today. We know it is a product of movements in the molten outer core, whose high iron content turns convection currents into a dynamo, and these currents in turn are produced by the solidification of the inner core.

25.04.2024 - 23:45 [ livescience.com ]

Earth‘s magnetic field formed before the planet‘s core, study suggests

(24 April 2024)

Today, the magnetic field is driven by the churning of the liquid part of the core and the transfer of heat from the solid inner core to the convective outer core as the former cools. But researchers think the core didn‘t solidify until about a billion years ago.

02.01.2020 - 11:32 [ ScienceDaily.com ]

Challenging core belief: Have we misunderstood how Earth‘s solid center formed?

(07.02.2018)

It is widely accepted that the Earth‘s inner core formed about a billion years ago when a solid, super-hot iron nugget spontaneously began to crystallize inside a 4,200-mile-wide ball of liquid metal at the planet‘s center.

One problem: That‘s not possible-or, at least, has never been easily explained-according to a new paper published in Earth and Planetary Science Letters from a team of scientists at Case Western Reserve University.