Scientists have long known they could increase the lifespan of mice and more primitive creatures -- worms, flies -- with deep, long-term cuts in what should be normal consumption.

• 科学家早就知道，他们可能会增加小鼠的寿命和更原始的生物-蠕虫，苍蝇-深，长期的削减应该是什么正常的消费。