A map of the Earth showing the present-day deviation from expected magnetic field direction. Strong deviations are in yellow-orange, and little deviations are in blue. The star is Saint Helena, which ...

Far beneath the Atlantic, a vast distortion in Earth’s magnetic shield has been charted with a clarity that would have been unthinkable a decade ago. The South Atlantic Anomaly, a sprawling weak zone ...

In 2008, Erez Ben-Yosef unearthed a piece of Iron Age "trash" and inadvertently revealed the strongest magnetic-field anomaly ever found. Ben-Yosef, an archaeologist at Tel Aviv University, had been ...

If there’s a need to adapt to a seriously weakened magnetic field, it’s also likely to be expensive. This image from the James Webb Space Telescope shows “mountains” and “valleys” speckled with ...