Biosphere 2
Walford was one of the eight “crew members” who were sealed inside Biosphere 2 where they lived from September 26, 1991 to September 26, 1993. Walford served as the crew's physician. During his stay in Biosphere 2, the crew found that they could not grow as much food as anticipated, so Walford convinced the crew to follow his calorie restriction diet. It is claimed that this action “produced dramatic weight loss and improved health.” Despite this, in November of the first year the crew decided to open a cache of emergency food supplies grown outside of the bubble to supplement their meager diets.
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