News Earth Geomagnetic field flip-flops in a flash Scientists unearth more evidence of superfast changes in Earth’s magnetic polarity Share this:FacebookTwitterPocketRedditPrintEmail By Alexandra Witze September 2, 2010 at 1:22 pm This article is only available to Science News subscribers. Subscribers, enter your e-mail address to access our archives. Client key* E-mail* Log in Not a subscriber? Science News is a nonprofit. Support us by subscribing now. Subscribe