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**ADVANCE FOR USE IN WEEKEND EDITIONS, MAY 3-4, AND THEREAFTER** Rocky, a mechanical "robo-squirrel," at Hampshire College in Amherst, Mass., is shown on duty on the campus Tuesday, April 15, 2008. In back are Sarah Partan, Hampshire assistant professor of animal behavior, left, and student Maya Gounard, 20, spying on real squirrel activity nearby. Rocky is among many robotic critters worldwide letting researchers observe animals in their natural environments rather than in labs. (AP Photo/Nancy Palmieri)

Robótica e a Natureza

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