Learn how some of Earth’s magnetic field flips last longer than others, weakening our defenses against cosmic radiation.

Far below the deepest boreholes, Earth’s core appears to keep its own rhythm, a slow magnetic throb that repeats roughly ...

Earth's magnetic field is generated by the churn of its liquid nickel-iron outer core, but it is not a constant feature.

Ancient rocks show Earth’s magnetic field followed deep heat patterns inside the planet for hundreds of millions of years.

Earth’s magnetic field can linger in a weakened, unstable state for tens of thousands of years before fully flipping.

Deep beneath the ocean floor, ancient sediments hint that Earth’s magnetic field sometimes changed far more slowly than expected.

The continent-sized blobs are much hotter than the lower mantle, creating a significant temperature gradient in the rocky ...

Add Yahoo as a preferred source to see more of our stories on Google. Over 11 years of satellite data reveal that Earth’s magnetic field is reshaping. (CREDIT: Shutterstock) More than a decade of ...

Forbes contributors publish independent expert analyses and insights. David Bressan is a geologist who covers curiosities about Earth. Without its magnetic field, life on Earth would not be possible ...

Learn about the continent-sized rocks hidden deep within Earth's mantle that have influenced the magnetic field for millions ...

Exploring Earth's deep interior is a far bigger challenge than exploring the solar system. While we have traveled 25 billion ...