LifePrehistoric cinema: A silver screen on the cave wall With cartoon frescoes, shadow theatre and a rudimentary form of animation, our ancestors knew how to bring their stories to life, says Catherine BrahicFeatures
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