please see this English text ... The Earth’s magnetic field has reversed a number of times in its history. Before the poles actually flip, the magnetic field weakens and the magnetic poles drift away from “true” north and south. >>>magnetic poles drift away from “true” north and south. what does 'drift away' means ? I don't understand the meaning of 'drift away' ...I need english help ..... any native speaker or someone knows better english ? N.B: is not the north pole of earth's magnetic field a little distant away from geographic north pole ?