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The problem of geomagnetic reversal, once considered intractably complex, is one of the hottest topics in the Earth sciences. This phenomenon, in which the Earth's magnetic field occasionally flips between opposite polarities, is rooted in dynamo action, a process that generates electric currents in the convecting fluid comprising the Earth's metallic outer core. Much of our knowledge about reversals comes from 3 decades of analysis of the fossil magnetic records preserved in rocks, and a recent new look has prompted three unexpected claims. The first is that reversing fields are strikingly simple, retaining a dual-pole structure during the process.