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Frogs, like everything around and inside us, are made up of millions and billions of atoms. Each of these atoms contains electrons that whizz around a central nucleus, but when atoms are in a magnetic field, the electrons shift their orbits slightly. These shifts give the atoms their own magnetic field so when a frog is put in a very strong magnetic field, it is essentially made up of lots of tiny magnets.
"The fact that the only two flying vertebrates, bats and birds, do not derive the same information about direction from the Earth's magnetic field despite apparently similar navigational requirements has very important implications for the evolution of the magnetic sense in vertebrates," co-author Stuart Parsons from the University of Auckland, New Zealand told PhysOrg.com. "I think it is likely that other mammals possess the ability to detect the field, i.e. have the physiological and anatomical specialization necessary. However, this does not mean that they actually use this information."
The researchers had predicted that magnetic polarity could help these flying mammals in thermoregulation, as they need warmer locations to breeding and to decrease energy consume during torpor (in the dry summers) or hibernation (during the cold winter). The magnetic polarity is used more than for roosting: some bats, like Nyctalus noctula, can navigate during their seasonal migrations up to 1600 km (1000 mi).
Originally posted by stupid girl
reply to post by Jeanius
What in the H. E. double toothpicks is on your avatar?? What is that from? That is so extremely disturbing.....I wanna get a better look at it, lol...