Very interesting article about the possible type of molecule that is used by birds to detect the earths magnetic field. Enjoy. http://www.physorg.com/news128778632.html Dr. Stephen J. Harvey Shawnee State University and Ohio University ______________________________________________________________________ Ohio-birds mailing list, a service of the Ohio Ornithological Society. Our thanks to Miami University for hosting this mailing list. Additional discussions can be found in our forums, at www.ohiobirds.org/forum/. You can join or leave the list, or change your options, at: http://listserv.muohio.edu/scripts/wa.exe?LIST=OHIO-BIRDS Send questions or comments about the list to: [log in to unmask]