Article Title,Year,Volume,Issue,Page Range,Author Is child death the crucible of evolution?,2008,2,4 Spec Iss,247-260,Volk Oxytocin and cooperation: Cooperation with nonkin associated with mechanisms for affiliation,2008,2,4 Spec Iss,234-246,Reyes Sex differences in the assessment of pain versus pleasure facial expressions,2008,2,4 Spec Iss,289-298,Hughes