Geophysics
Researchers have found that Earth's inner core exists in a superionic state, where carbon atoms move freely through a solid iron lattice, explaining its unexpectedly soft behavior. This discovery, confirmed through experiments simulating core conditions, resolves long-standing seismic puzzles. The findings suggest the core's dynamics may also support the planet's magnetic field.
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Geophysicists have simulated how Earth's magnetic field could emerge from a fully liquid core, challenging previous assumptions. By minimizing viscosity effects, the model shows a self-sustaining dynamo similar to today's. The findings, published in Nature, shed light on planetary history and future magnetic changes.