It is not glamorous work. it's hot and filthy and exhausting. Home is a mud-walled hut shared with 30 Fongoli villagers. Dinner is peanut sauce over rice, except when it's peanut sauce over millet. If the chimps wander unusually far, Pruetz gets back to the village so late that her portion has long ago been fed to the dogs. Sometimes, rather than hike the five miles back to camp, she curls up and sleeps on the ground. She has gotten malaria seven times.