William Stone Quotes
Generally speaking, moving water is the most dangerous thing you can encounter underground.
Citations
Stone, William, Barbara am Ende, and Monte Paulsen. Beyond the Deep: The Deadly Descent into the World's Most Treacherous Cave. Warner Books, 2002.
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William C. "Bill" Stone is an American engineer, caver and explorer, known for exploring deep caves, sometimes with autonomous underwater vehicles. He has participated in over 40 international expeditions and is president and CEO of Stone Aerospace.