Earth’s magnetic field overdue for a chaos-causing (possibly life-altering) flip

http://news.nationalpost.com/2012/10/03/earths-magnetic-field-overdue-for-a-chaos-causing-possibly-life-altering-flip/?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+NPWorld+%28National+Post+-+World%29&utm_content=Google+Reader