Why Humans Like to Cry: Tragedy, Evolution, and the Brain

Human beings are the only species to have evolved the trait of emotional crying. We weep at tragedies in our lives and in those of others - remarkably even when they are fictional characters in film, opera, music, novels, and theatre. Why have we developed art forms - most powerfully, music - which move us to sadness and tears? This question forms the backdrop to Michael Trimble's discussion of emotional crying, its physiology, and its evolutionary implications.

His exploration examines the...