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Read articles, including Science News stories written for ages 9-14, on the SNK website.
Pumpin' it

Owen, a 29-year-old Rhesus monkey at the Wisconsin Primate Research Center in Madison, checks out his reflection while hefting a toy dumbbell. Owen is the oldest surviving monkey in a decades-long study of diet and aging in primates. He is part of a control group fed a healthy diet with unrestricted calories. Monkeys in an experimental group are fed a diet with 30 percent fewer calories. Credit: © Univ. of Wisconsin-Madison Communications /Jeff Miller

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