Viggen Posted May 13, 2006 Report Share Posted May 13, 2006 Ship logs and pottery show how the geomagnetic field has changed. While sailors plied the Seven Seas in the seventeenth and eighteenth centuries, little did they know that their ships' logs would one day help scientists to reconstruct the history of the Earth's magnetic field. Geophysicist David Gubbins and his co-workers at the University of Leeds in England have used old navigational data, combined with records taken from archaeological artefacts, to figure out how the direction and strength of the magnetic field changed between 1590 and 1840, roughly the time between Francis Drake's voyages on the Golden Hind and Charles Darwin's journey on the Beagle. full article at Nature Quote Link to comment Share on other sites More sharing options...
phil25 Posted May 13, 2006 Report Share Posted May 13, 2006 How does that relate to the "Earth's Core", pray? I know that in physical terms the magnetic field relates to it - but the title of this thread is frustratingly like a tabloid headline!! Intriguing but no substance. Phil Quote Link to comment Share on other sites More sharing options...
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