The flap over magnetic flips: what happens when the Earth's magnetic field reverses itself? (geomagnetic reversals) From: Science News | Date: June 12, 1993| Author: | COPYRIGHT 1993 Science Service, Inc. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan.  All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information) Copyright information

The way Carlo Laj tells it, the 1980s were a dead time for scientists studying Earth's peculiar habit of flipping its magnetic field every few hundred thousand years. Laj and other paleomagnetists spent the decade roving the world, accumulating records of times when the magnetic field reversed itself, switching north pole for south and then back again. But even as their databases grew, the study of geomagnetic reversals foundered for lack of new theories to guide the research.

"The community was slowly going to sleep," says Laj, a geophysicist at the Centre des Faibles ...

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