For decades, scientists have theorized about the existence of a weak, invisible electric field surrounding Earth, known as the ambipolar field. Now, using the Endurance spacecraft, researchers have successfully measured this field for the first time. This discovery has profound implications for understanding Earth’s atmosphere, the evolution of planets, and possibly even the origin of life. The ambipolar field, despite its subtle presence, influences the density of the ionosphere and could potentially play a role in shaping Earth’s atmosphere and even life itself. The discovery opens up a new frontier in planetary science, allowing researchers to investigate the role of this field in shaping other planets with atmospheres.