It doesn't happen all of a sudden! It has happened over and over in the Earth's history. There are large areas of the mantal that have reversed polarity. There is a global map charting it.
We are not going to die!
God, the halftime show stinks!
Mike
87 posted on 02/06/2011 5:16:55 PM PST by MichaelP
("Two things are infinite: the universe and human stupidity; and I'm not sure about the the universe.)