pEL HIGUERON, Peru ndash; Carlos Cruz Chanta lives just off a rutted dirt road, almost lost in the mist, outside this village on a steep ridge of jungle-covered mountains. Like his neighbors, he makes his living raising livestock and growing corn, fruit, beans, and coffee./p a href=http://www.scientificamerican.com/article.cfm?id=andes-extreme-cold-extracts-bitter-toll[More]/a