What do you see happening? Discuss why, when one person yawns, it triggers someone else to yawn, too.
Showing posts with label yawning. Show all posts
Showing posts with label yawning. Show all posts
Friday, September 23, 2016
5 Minute Science Lesson - Yawning
What do you see happening? Discuss why, when one person yawns, it triggers someone else to yawn, too.
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