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Laughter's complex social life

All humans have the ability to laugh. But do we all use it in the same way?

Laughter is a universally recognised emotional expression. But do we all use it the same way?

Despite its importance in everyday life, laughter had been neglected in scientific research for most of the 20th Century, as psychologists instead focused on understanding our negative emotions.

That has now changed, as psychologists discover its many important roles in our social lives. View the video above the find out more.

Body of Evidence is a video series from BBC Future unravelling medicals myths and curious health conditions.

Video script: Arabella Turek