Confirming what diet advocates have been saying for years, a long term study begun in 1989 has concluded that rhesus monkeys who reduce their calories by 30% enjoy longer, healthier, lives. The Wisconsin study found that over 20 years, 14 of 38 monkeys on normal diets died of age-related causes, versus only five monkeys on a reduced calorie diet. But despite its findings, the professor who led the study, Richard Weindruch, has been slow to evolve. "I found it difficult to adhere to such a diet, despite studying it for so many years," he told the Wall Street Journal. "I'm not the poster child for human application."