Every 200,000-300,000 years, Earth's magnetic poles do something extraordinary. They completely flip, meaning the North pole becomes the South, and vice-versa. The last full reversal took place ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through the links below." Earth itself is a giant magnet. Because Earth spins and has an energized liquid metal core, it is in ...

Forbes contributors publish independent expert analyses and insights. David Bressan is a geologist who covers curiosities about Earth. Oct 23, 2025, 12:48pm EDT Oct 23, 2025, 01:42pm EDT Illustration ...

Hundreds of millions of years ago, Earth’s magnetic field behaved in a way that has long baffled scientists, showing wild and seemingly chaotic shifts unlike anything seen before or since. A new study ...

Stephen has degrees in science (Physics major) and arts (English Literature and the History and Philosophy of Science), as well as a Graduate Diploma in Science Communication. Stephen has degrees in ...

Earth is the only planet known to support life. Learn about what Earth is made of and where it came from. When you purchase through links on our site, we may earn an affiliate commission. Here’s how ...

Long before humans invented compasses, migrating birds, sea turtles, salmon and perhaps even some insects were already using Earth’s magnetic field as a guide. Because the molten metal in the outer ...