Body language can vary significantly across different cultures and nations. Some key differences include: - Handshakes styles differ, such as hard vs soft grips in places like the US, France, Germany, and Middle East. - Eye contact norms are also varied, with direct contact encouraged in the West but seen as rude in places like Japan and the Middle East. - Smiling is more common for greetings in North America, but other cultures like Korea and Asia may view constant smiling differently. - Head movements and gestures related to nodding or eye behaviors carry different meanings across cultures as well.