Any of us who have ever taught magnetics in an undergraduate geophysical exploration course are familiar with the common curly questions regularly asked by students about the Earth's magnetic field. What is the source of the Earth's magnetic field? Why do the magnetic poles not align with the rotational poles? How does an optically pumped magnetometer work? Why does the magnetic field reverse polarity at irregular intervals? How long does a field reversal take? Will we all die if a reversal happens tomorrow? The answers to these and myriad similar questions lie outside the normal range of experience for a...

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