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What Happens When I Yawn?
What Happens When I Yawn?
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ISBN 9781433993589
Why do people yawn? Is it because we need oxygen? Or do we yawn to cool off our brain? The answer is, scientists aren't totally sure just yet, but they have many great theories. The vibrant photographs and diagrams in this book help demonstrate what happens in the body when we yawn. The scientific yet accessible text was designed to both interest and enlighten readers of all ages.
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Pub dateAug 16, 2013
ISBN-101433993589
ISBN-139781433993589
LanguageEnglish
Last updated 2026-09-08 03:54
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