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The biggest-ever sample of core material from Earth's mantle could have valuable clues into the origins of lifeThe mantle is Earth's largest layer of rocks ... The core we drilled as part of the IODP project is the best model we have for the rock "substrate" of the Lost City. The new core is therefore ...
The Earth's interior is composed of four layers, three solid and one liquid—not magma but molten metal, nearly as hot as the surface of the sun. The deepest layer is a solid iron ball ...
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