Cattle shown to align north-south
Have you ever noticed that herds of grazing animals all face the same way?
Images from Google Earth have confirmed that cattle tend to align their bodies in a north-south direction.
Wild deer also display this behaviour - a phenomenon that has apparently gone unnoticed by herdsmen and hunters for thousands of years....
http://news.bbc.co.uk/2/hi/science/nature/7575459.stm