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Publisher's Summary

In this issue:
"A New Path to Longevity": Researchers have uncovered an ancient mechanism that decelerates aging.
"The Compass Within": Scientists are learning how animals’ internal compass works.
"The Department of Pre-Crime": Data-rich computer technology is alerting cops to where crimes are about to happen.
"More Food, Less Energy": We can cut down on energy-use and make our bodies and our ecosystems healthier.
©2012 Scientific American
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