Roughly 42,000 years ago, Earth’s magnetic field weakened dramatically during the Laschamps geomagnetic excursion, allowing more cosmic radiation to reach the atmosphere. In a peer‑reviewed study of ...

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

"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: It used to be thought that there were more volatiles ...

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

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

A stream of charged particles known as the solar wind flows from the Sun toward Earth. Here, it meets the Earth's magnetic ...

Did Earth’s magnetic field help make life possible on the planet? A new NASA-funded study suggests the answer may lie deep in ...

The Earth's magnetic field and oxygen evolved together over 540 million years, according to a major NASA study.