An ancient magma ocean may have once driven Earth’s magnetic field
Molten silicate might solve a long-standing magnetic mystery
![Earth's magnetic field](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2020/02/022620_cc_earth-magnetic-field_feat.jpg?fit=1028%2C579&ssl=1)
Today, Earth’s magnetic field (visualized) is powered by electrically conductive fluid in the outer core. Billions of years ago, a churning, buried sea of magma circling the nascent core may have been responsible.
NASA's Scientific Visualization Studio/JPL-NAIF