Send a comment on this item to LII: Send a comment on this item to LII staff, who on weekdays will usually reply within 24 hours. Magnetic Storm This site is a companion to a Public Broadcasting Service (PBS) NOVA program about the magnetic field that protects the Earth from radiation, its current weakening and potential for continuation or reversal, and effects of these changes on animals. The site features essays, images of auroras ("the most visible signs of Earth's magnetic field"), a simulated flip of the Earth's magnetic field, a teacher's guide, and related links. http://www.pbs.org/wgbh/nova/magnetic/ Asterisk * indicates required field. Your Name Your Email Address * We will not sell or provide your email address to anyone else. Comment * Enter the verification code as it is shown in the box below. This helps prevent automated submissions. *