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Earth’s Magnetic Field Have A 200 Million-Year-Long Cycle As Found From Rock Samples in Ancient Lava – Science Times

Scientists have previously noticed that the Earth’s magnetic field seems to decay periodically, but the reason was unidentified…

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Earth’s magnetic field is the magnetic force flow into the northern hemisphere and out of the southern hemisphere. According to Physical Geology, Earth’s magnetic field s generated within the planet’s outer core by the convective movement of liquid iron.

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