Hooray, what I must assume is deliberate ignorance.
Look, educate yourself on the difference between the MAGNETIC north pole (the one defined by the magnetic field, probably caused by movement in the molten core of the earth, who's only serious influence on the earth is the direction compasses (including the ones inside a bird's head) point) and the GEOGRAPHIC north pole (the one defined by the rotation of the earth as a whole, which defines the coldest parts of the world).
The MAGNETIC north pole drifts constantly and flips occasionally (though not what one might call "regularly"). This is not accompanied by any cataclysmic extinction event, and takes place over dozens or even hundreds of years. It did not happen during the Mayan or Egyptian cultures, and unless you think they were sending probes to the mid-Atlantic ridge they were unlikely to even be aware of it much what able to predict it better then modern science (which says the field will probably begin flipping sometime in the next 10 to 200,000 years). The magnetic north pole has no influence over how cold it is in any given place on earth.
The GEOGRAPHIC north pole doesn't drift appreciably, or flip - ever. If it did flip, the most obvious sign would be that the sun would rise in what we currently think of as the west, and set in what is now the east. Also, all the stuff that got flung into space as the earth stopped spinning suddenly and then started up again in the opposite direction. Or if it happened more gradually, summers and winters would gradually get more extreme until the entire world spent half of every year (as opposed to half of every day) in the sun, and the other half in the shade, at which time the trend would reverse until it came to a rest exactly as it is now but with the sun rising in what was the west and setting in what was the east. Both methods would take similarly ludicrous amounts of energy, and probably kill most large animals and plants.