What Happens When I Yawn?

ISBN-10: 1433993600
ISBN-13: 9781433993602
Category: Juvenile Nonfiction
Pages: 24
Language: English
Published: 2013-08-01
Publisher: Gareth Stevens Publishing LLLP
Author: Aleaha Schwinn

Description

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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