HealthBSE infected cattle have prions in saliva The discovery of tiny levels of prions in cow saliva might pave way for a test for BSE before symptoms develop, and raises questions about transmission ¿ìè¶ÌÊÓÆµ
HumansTragic tears: Why we are the only animals that cry In Why Humans Like to Cry, Michael Trimble argues that tears of sadness provide a type of joy, that may have co-evolved with tragedy CultureLab