Why Do I Yawn?

by Kolpin, Molly
ISBN: 9781491421079
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Overview

Everyone yawns, including tiny babies and furry animals. But what makes us yawn? Are we tired, bored, or just copying someone else? Using simple, informative text and colorful photos, young readers find out all the theories scientists have about why we yawn.
  • Format: Hardcover
  • Author: Kolpin, Molly
  • ISBN: 9781491421079
  • Condition: Used
  • Dimensions: 11.40 x 0.20
  • Number Of Pages: 24
  • Publication Year: 2015
Language: English