Which monkey will live longer.

• Position: NEWS & TRENDS - Research on effects of lower-calorie diet on aging and life span of rhesus monkeys - Brief article

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Caption: WHICH MONKEY WILL LIVE LONGER? Canto, 27 (left),and Owen, 29, are part of a 20-year study of rhesus monkeys to find out whether lower-calorie diet will slow aging and extend life spans. Known as calorie restriction, the regimen has all the ingredients but 30 percent fewer calories. Mice kept on a similar diet from birth have been known to live up to 40 percent longer than mice fed normally, and scientists at the University of Wisconsin-Madison want to find out if the same might be true in primates--including people. Since rhesus monkeys...