Yahoo.com reports that a new study has found that ants possess an internal pedometer which they rely on to find their way back home after expeditions for food. Science has long wondered how ants always seem to take the most direct route in returning home from foraging expeditions. Various hypotheses have been posited over the years: ants use celestial clues, remember landmarks, other ants teach them the way, and so on. To try to learn how ants navigate, experimenters used techniques to either lengthen, or shorten ants’ strides. Then, the ants were made to navigate to a destination 30 feet away. The ants with lengthened strides overshot the destination, while the ants with shortened strides stopped short. However, the number of steps taken was the same…