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COPYRIGHT 2005 Natural History Magazine, Inc.
Hunger: An Unnatural History by Sharman Apt Russell Basic Books, 2005; $23.95
At the risk of oversimplifying, you can think about the body as if it were a car. Ordinarily, about 2,000 calories a day are needed to keep it running, and most of us top the tank off frequently, so that regular meals provide most of those calories. In a pinch, there's a large reserve, about 160,000 calories, stored primarily in fat and muscle tissues: enough to keep a person puttering around, in principle, for about eighty days.
Most everyone has experienced hunger at one time or another. But I would...
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