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What is the origin of the Earth's magnetic field?
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What is the origin of the Earth's magnetic field?
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Origins of Earth's magnetic field remain a mystery | MIT News | Massachusetts Institute of Technology
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The Earth's Magnetic Field
Dynamo theory - Wikipedia
What are magnetic fields and how do they shape the Universe? - BBC Sky at Night Magazine
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Paleomagnetism
Magnetic Field of the Earth, Characteristics and Origin
NASA's Cosmos
