Earth's magnetic history

Earth's magnetic history involves periodic changes in its magnetic field, known as magnetic pole reversals, where north and south poles swap places. These reversals happen irregularly over millions of years and are recorded in the alignment of minerals in rocks. The Earth's magnetic field is generated by moving molten iron in its outer core, creating a dynamo effect. Over time, the field's strength varies, sometimes weakening significantly before reversing. This magnetic activity influences compass readings, animal navigation, and has shaped the planet's evolution, highlighting a dynamic and ever-changing magnetic environment central to Earth's natural history.