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Why do we yawn?
22/05/2018 10:47 am
/ 08:30
Yawning is generally triggered by several things, including tiredness, fever, stress, drugs, social and other psychological cues. These are generally well documented and vary between individuals.
Gareth spoke with Yossi Rathner, Human Physiology Lecturer, Swinbunre University of Technology.
Press play to hear the full interview.
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