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5 gen 1900 anni - In Baltimore, physicist Dr. Henry A. Rowland of Johns Hopkins University announces that he has discovered that the cause of Earth's magnetic field was its own rotation, based on experiments to produce magnetism by the rotation of a motor

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ByClaire the Bread Fascist
15 set 2023
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5 gen 1900 anni
Adesso
~ 125 years ago
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