There is supposed to be a switch of magnetic poles in several thousand years which already started 150/200 years ago. This gave me an idea. Can the changing magnetic orientation cause the whales (and other large mammals living in the sea who use the earths magnetic field) to "crash" on shores and beaches as they often do? Also one question regarding the flip itself. I read on PF that the flip is supposed to be gradual. Slowly "sucking through the ground" from north to south. Does that mean that there will be virtually no magnetic field protecting us during certian period of time?