Our home planet is seeming more like a jawbreaker the more we learn about its interior.
A new analysis of Earth's innards suggests the presence of an inner core within the inner core – a dense ball of iron at the very center of our planet.
is the inner core – the densest part of our planet, a solid ball mostly composed of iron and nickel, comprising less than 1 percent of Earth's volume.As the inner core grows, the solidification process releases heat and light that drives convection in the outer liquid core – the engine that powers the dynamo that converts kinetic energy into magnetic energy and maintains Earth's global magnetic field.
However, the number of global seismic monitoring stations around the globe is continuing to grow, constantly recording the imperceptible shuddering of the planet beneath our feet. And now seismologists Thanh-Son Phạm and Hrvoje Tkalčić from the Australian National University in Australia have figured out a way to squeeze data on the innermost inner core out of those recordings.
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