The land mass that became Antarctica once sat along the Equator. Over Earth’s history, several supercontinents have broken up and come back together like the Backstreet Boys.
Every several years, magnetic field observatories record quick changes to the position or strength of the planet’s magnetic field, so-called geomagnetic jerks. The cause of these shifts has remained a mystery. Continue reading Blobs in Earth’s Core Could Be Causing ‘Geomagnetic Jerks’ in the Magnetic Field