What’s going on in the earth’s core?

The inner core of the Earth is simultaneously melting and freezing due to circulation of heat in the overlying rocky mantle.

The findings, published in “Nature”, could help us understand how the inner core formed and how the outer core acts as a “geodynamo”, which generates the planet’s magnetic field.

“The origins of Earth’s magnetic field remain a mystery to scientists,” said researchers. “We can’t go and collect samples from the centre of the Earth, so we have to rely on surface measurements and computer models to tell us what’s happening in the core.”