Not much, the mantle appears to be solid rock on human time periods. There may have previously been a worldwide magnetic field on Mars, according to recent research.
The majority of the interior of the Earth is made up of the mantle. The Earth's thin exterior layer, the crust, and its deep, extremely hot core are separated by the mantle. The mantle makes up a staggering 84% of the entire volume of the Earth and is around 2,900 kilometers (1,802 miles) deep.Iron and nickel swiftly separated from other rocks and minerals when Earth started to take shape around 4.5 billion years ago, forming the planet's core. The early mantle was the molten material that encircled the core.
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