Why do we yawn and why is it contagious? This Scientific American piece should tell us, but doesn’t really. Still at least they’re brave enough to admit they don’t know, and the article does provide some interesting information.
Why do we yawn and why is it contagious? This Scientific American piece should tell us, but doesn’t really. Still at least they’re brave enough to admit they don’t know, and the article does provide some interesting information.
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