Usually, the boundary between science and science fiction is as distinct as the difference between the 6 o'clock news and "The Simpsons." Wherever the line blurs, you're bound to find contentious debates. One of the longest-running of these disagreements centers on dowsing, a supposed sixth sense that enables people to find underground water using a forked branch, pendulum or pair of bent wires. There is no scientific reason why dowsing should work. Yet, it apparently works well enough and reliably enough to keep the practice alive.
The success of dowsers doesn't surprise the people who know the most about finding underground water, hydrogeologists for the United States Geological Survey (USGS). They point out that the United States is so water-rich you can get wet drilling just about anywhere, if you drill deep enough.
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