Missing link in metal physics explains Earth?s magnetic field

Earth?s magnetic field is crucial for our existence, as it shields the life on our planet?s surface from deadly cosmic rays. It is generated by turbulent motions of liquid iron in Earth?s core. Iron is a metal, which means it can easily conduct a flow of electrons that makes up an electric current. New findings show that a missing piece of the traditional theory explaining why metals become less conductive when they are heated was needed to complete the puzzle that explains this field-generating process.?