In this April 17, 2008 file photo, cows are seen grazing on the farm near Rio, Wis. Do cows have a compass? Somehow, cattle seem to know how to find north and south, say researchers who studied satellite photos of thousands of cows around the world. Cattle that were grazing or resting tended to align their bodies in a north-south direction, a team of German and Czech researchers reports in Tuesday's issue of Proceedings of the National Academy of Sciences. (AP Photo/Morry Gash, File)