Why do we yawn?
11 November - 7 minsWhat makes us yawn? We all do it, but few of us actually know why. Even today, scientists are still puzzled by the recurring action. Wrongly attributed to breathing, the instinctive act might have more to do with our brains and neurological functions.
Professor of Behavioural Biology at John Hopkins University, Andrew Gallup joins Seán to discuss the breakthrough on the contagious gesture few of us understand…