Alan wrote:
Perhaps this is off topic, but I was wondering if anyone else saw NOVA last
night. (11/18/03) The program was about the reversing of polarity of Earth
every few hundred thousand years. In the show, some of the scientists
referred to Earth as a dipole with a magnetic field that alternates.

They just mean a magnetic field with a 1-North and 2-South pole. Every magnet
has at least two poles. So far, to the best of my knowledge, nobody (on earth)
has detected a magnetic monopole (although such is predicted by some theories).
--
73, Cecil http://www.qsl.net/w5dxp



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