Head shake
Shaking to indicate "no" is widespread, and appears in a large number of diverse cultural and linguistic groups.Areas in which head shaking generally takes this meaning include the Indian subcontinent, the Middle East, Africa, Southeast Asia, Europe, South America, North America and Australia.However, in some Southeastern European areas such as Bulgaria[2] and southern Albania, it is used for the opposite purpose, to indicate affirmation, meaning "yes".An early survey of head shake and other gestures was The Expression of the Emotions in Man and Animals, written by Charles Darwin in 1872.Darwin wrote to missionaries in many parts of the world asking for information on local gestures, and concluded that shaking head for "no" was common to many different groups.