Halley's Hollow Earth: A Beautiful Blunder

In the 17th century, astronomer Edmond Halley proposed a hollow Earth theory, suggesting three concentric spheres within our planet, each inhabited and held together by magnetism. While based on limited scientific knowledge and ultimately disproven, his theory ingeniously explained variations in the Earth's magnetic field. Although incorrect, Halley's meticulous geomagnetic data collection and insightful speculation about Earth's interior laid groundwork for future geological research, showcasing the spirit of bold hypothesis and experimentation in scientific inquiry.