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 ...

"A strong magnetic field is very important for life on a planet." ...

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 ...

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

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

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