Magnetic storm: Something weird is happening to Earth

[Guest guest]

Impact on Animals Would a dramatic change in the Earth's magnetic field affect creatures that rely on it during migration? When CompassesPoint South As this time line shows, our planet's magnetic shield has reversed its direction hundreds of times. Gallery of Auroras Auroras like those displayed here would be visible every night of the year during a magnetic field reversal. See a Reversal Watch a simulated flip of the Earth's magnetic field, from the first signs of instability to the final reversal. TV Program DescriptionAiring on PBS October 24 at 8 pmCheck local listings as dates and times may vary. Watch a Preview NOVA News MinuteWatch a news clip related to NOVA's "Magnetic Storm" program. Links & BooksTeacher's GuideProgram TranscriptBuy the Video Credits Don't miss upcoming NOVA broadcasts and companion Web sites— to our e-mail bulletin. Support authoritative science programming like NOVA by making a pledge to your local PBS station today. Pledge now. This Web site was produced for PBS Online by WGBH.Web site © 1996-2003WGBH Educational Foundation Additional funding is provided by the Howard Hughes Medical Institute, the Corporation for Public Broadcasting, and public television viewers. http://www.pbs.org/wgbh/nova/magnetic/