Earth’s magnetic field feels permanent, but science tells a far more fragile story. Long before modern life emerged, the invisible shield protecting the planet from solar radiation weakened to a ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Here’s what you’ll learn when you read this story: When samples of lunar dust touched down with returning ...

Four-and-a-half billion years ago, Earth’s surface was a menacing, hot mess. Long before the emergence of life, temperatures were scorching, and the air was toxic. Plus, as a mere toddler, the Sun ...

A surprise G2 geomagnetic storm on May 4, 2026, underscored the challenge of forecasting the magnetic structure of solar eruptions. In response to such uncertainties, new initiatives are advancing ...

Scientists combined two huge geological records. One tracks the virtual geomagnetic axial dipole moment, a measure of how strong the global magnetic field has been at different times. The other ...