NASA Agathe Lise-Pronovost, University of Melbourne February 16, 2021 – About 41,000 years ago, something remarkable happened: Earth’s magnetic field flipped and, for a temporary period, magnetic north was south and magnetic south was north. Palaeomagnetists refer to this as a geomagnetic excursion. This event, which is different to a complete magnetic pole reversal, occurs […]