The Haunting Sound of Earth’s Magnetic Field Flipping 🔊 41,000 years ago, something extraordinary happened: Earth’s magnetic field flipped. During this event, known as the Laschamp excursion, the field weakened to just 5% of its strength, leaving the planet exposed to cosmic radiation like never before. Now, for the first time, scientists have turned this ancient magnetic shift into a soundscape, and it sounds really... otherworldly. Using data from ESA’s Swarm mission, researchers mapped the m