There is no chemically sensible reason why bacteria would have favored this compound of iron over all others unless the magnetic properties of this element were important, or useful, in some way. Biologists think that bacteria may use these internal compasses to sense where 'down' is so that they can find food.
www.astronomycafe.net/qadir/ask/a11651.html
The animal world has its share of celebrated navigators, from flocking geese to spawning salmon. ... "We know that lots of animals use the earth's magnetic field as a compass," said Charles Walcott, a professor of neurobiology and behavior at Cornell University in Ithaca, New York, and a longtime homing pigeon researcher.
news.nationalgeographic.com/news/2003/01/0106_030106_lo... news.nationalgeographic.com/news/2003/01/0106_030106_lobster.html
Animal magnetism ... Moreover, Kirschvink notes that even if the main dipole field were to collapse—an event that can last for up to 10,000 years during a reversal—residual fields 5 or 10 percent as strong as the main field would remain on the surface, and animals would be able to use those quite well for migration.
www.pbs.org/wgbh/nova/magnetic/animals.html www.pbs.org/wgbh/nova/magnetic/animals.html
In animals, the use of small magnetic particles (e.g., magnetite) as magnetoreceptors has been suggested. The use of magnetite has been shown in magnetotactic bacteria that are rotated by a magnetic field because of the torque exerted on their magnetite particles.
www.ks.uiuc.edu/Research/magsense/ms.html
In fact, migratory birds are suspected to use magnetism, rather than sight, to make their long journeys. Bats and dolphins - even if they employ ultrasounds to find food, echolocation having been proved as not effective over large distances - were found to use Earth's electromagnetism in their long migrations.
news.softpedia.com/news/Earth-039-s-Magnetism-and-Life-... news.softpedia.com/news/Earth-039-s-Magnetism-and-Life-49050.shtml
Mesmer referred to this mysterious fluid as animal magnetism. ... Zoologists are studying the magnetic field generated and detected by the elephant-nosed fish from Africa at the American Museum of Natural History in New York City. Other scientists are studying how other animals detect magnetic fields.
psychicinvestigator.com/demo/MesrSpc5.htm
The scientists explain that animals which use magnetism to navigate are generally thought to use light exposure, magnetite receptors, or both. ... Why the two animals developed sensitivities to different magnetic information is still a question, however. Parsons speculated that an inclination compass may offer more...
www.physorg.com/news109511798.html
The animals on the covers of O'Reilly books are a hallmark of the brand, making them instantly recognizable on bookshelves throughout the ... Once a sketch is accepted, Lorrie then draws a more careful rendering to use as a model in the final process. This detailed sketch is often used for the O'Reilly catalog mock-ups.
oreilly.com/news/lejeune_0400.html
Nature - the world's best science and medicine on your desktop ... After much tagging and tracking, an international team of researchers from Italy, Sweden, and Wales have concluded that green sea turtles don't have to use magnetic cues to find their way around.
www.nature.com/nsu/001109/001109-6.html
Research has shown that some bacteria, pigeons and other animals use magnetism to relocate or migrate. ... Electricity and Magnetism: Electric Current (4:48)
videos.howstuffworks.com/hsw/11957-magnetism-how-magnet... videos.howstuffworks.com/hsw/11957-magnetism-how-magnetism-guides-animal-migration-video.htm