Today's John Tierney-authored Findings column discusses the evolution and significance of the upturned palm and its variants--the shrug, the downturned palm, etc:
That simple gesture, the upturned palm, is one of the oldest and most widely understood signals in the world. It's activated by neural circuits inherited from ancient reptiles that abased themselves before larger animals. Chimps and other apes, notably humans, adapted it to ask not just for food, but also for more abstract forms of help,... READ ON