The Morning After: Scientists confirm a fifth layer inside the Earth's core
Tear down the middle school geology posters: We have an update. A team at Australian National University has found evidence of ato the planet, an iron-nickel alloy ball in the inner core. The scientists found the hidden core by studying seismic waves that travel up to five times across the Earth's diameter – previous studies only looked at single bounces. The earthquake waves probed places near the center at angles that suggested a different crystalline structure deep inside.
The ANU researchers also believe the innermost inner core hints at a major event in Earth's past that had a"significant" impact on the planet's heart. As researchers told, it could also help explain the formation of the Earth's magnetic field. The field plays a major role in supporting life as it shields the Earth from harmful radiation and keeps water from drifting into space.
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