Vast ‘doughnut’ discovered in molten metal of Earth’s core

Australian scientists hail finding as a step in unlocking secrets of planet's protective magnetic field

By travelling to the centre of the Earth via seismic waves scientists have discovered a ring-like structure within the swirling pool of molten metal known as the outer core.

Research published in the journal Science Advances has identified a doughnut-shaped region within the outer core, parallel to the equator.