Scientists from the prestigious Oxford and Manchester technological institutes have made a groundbreaking discovery regarding the Earth’s magnetic field. Their findings, published in the Journal of Geophysical Research Solid Earth, reveal the oldest traces of the Earth’s magnetic field ever recorded. By analyzing ancient volcanic rocks found in Greenland, geologists were able to study the oldest minerals in the Earth’s mantle. These rocks were formed approximately 3.7 billion years ago, during a time when the magnetic field’s strength was at least 15 microteslas. This strength is similar to the current magnetic field of the Earth, which is around 30 microteslas. These findings provide the most accurate estimation to date of the Earth’s magnetic field strength throughout the entire geological record. Unlike previous studies that focused on specific regions, this research takes a holistic approach, offering promising and more precise data. Furthermore, it suggests that the Earth’s magnetic field has remained stable for billions of years, a crucial factor in the protection of the Earth’s magnetosphere. This stability has allowed life forms to migrate from the oceans to land, shaping the diversity and evolution of life as we know it today.