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The Conversation USA

What is it about yawning?

  • Written by Christine Calder, Assistant Clinical Professor of Behavior, College of Veterinary Medicine, Mississippi State University
You can't resist the yawn.Chayanin Wongpracha/Shutterstock.com

You know the feeling. It’s impossible to resist. You just need to yawn.

A yawn consists of an extended gaping of the mouth followed by a more rapid closure. In mammals and birds, a long intake of breath and shorter exhale follows the gaping of the mouth, but in other species such...

Read more: What is it about yawning?

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