Water dowsers

Also known as divining or water-witching, dowsing is the practice of using a forked stick, rod, pendulum, or other device to locate sources of water or minerals deep underground. The practice has been a subject of discussion and controversy for hundreds of years, if not thousands. The classic method of dowsing uses a Y-shaped stick. Holding one of the forks in each hand, a dowser walks back and forth over the area to be tested. When passing over a water source, the butt end of the stick is said to rotate downward. Many regard dowsing as pseudoscience.