Note: Dr. Williscroft is a retired submarine officer, deep-sea and saturation diver, scientist, author of numerous books and hundreds of articles, and a lifelong adventurer. He spent 22 months underwater, a year in the equatorial Pacific, three years in the Arctic ice pack, and a year at the Geographic South Pole. He holds degrees in Marine Physics and Meteorology, and a doctorate for developing a system to protect SCUBA divers in contaminated water. A prolific author of both non-fiction, Cold War thrillers, and hard science fiction, he lives in Centennial, Colorado, with his family.