An engrossing history of the science of one of the four fundamental physical
forces in the universe, electromagnetism, right up to the latest indications
that the poles are soon to reverse and destroy the world's power grids and
electronic communications A cataclysmic planetary phenomenon is gathering force
deep within the Earth. The magnetic North Pole will eventually trade places with
the South Pole. Satellite evidence suggests to some scientists that the move has
already begun, but most still think it won't happen for many decades. All agree
that it has happened many times before and will happen again. But this time it
will be different. It will