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Why Is Yawning Contagious?: Everything You Ever Wanted To Know About The Human Body And Some Things You'd Rather Not by Francesca Gould

Why Is Yawning Contagious?: Everything You Ever Wanted To Know About The Human Body And Some Things You'd Rather Not

Why

Francesca Gould

228 pages • paperback • 2007

nonfiction science informative medium-paced
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