• COVER:What Makes Us Moral - Morality and empathy are writ deep in our genes. Alas, so are savagery and bloodlust. Science is now learning what makes us both noble and terrible--and perhaps what can make us better
• HEALTH & MEDICINE: The Year in Medicine From A to Z - The new stem-cell breakthrough is the scientific bulletin of the year, but 2007 provided a whole alphabet of medical news, as TIME's A-to-Z guide shows
• SOCIETY: Facial Yoga - Laugh if you like, but these hot new workouts may actually help you look younger
• BUSINESS: Is Facebook Overrated? - The cool kid on the Web has everyone's attention, but the social-networking site still needs profits to match its promise
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