Why do we yawn when we see someone else yawn?
Résumé
After a hearty lunch at work, you and your co-workers go into a meeting. First one colleague starts to yawn, then a second and finally it’s your turn. Many biological explanations have been put forward for this, but what is the scientific consensus?
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Why do we yawn when we see someone else yawn - doc.pdf (34.66 Ko)
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