The Hawkeye

Chain reaction: the phenome-yawn

June 9, 2009

Most people don’t know that humans begin yawning at 11 weeks after conception, or that when one person yawns in a group,  half of the rest will yawn within five minutes: Yawning is an involuntary action...

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The student news site of Mountlake Terrace High School in Mountlake Terrace, Washington.
contagious