Do you ever find yourself yawning in response to another person’s yawn? Some say it seems to happen often and claim there is scientific proof behind the theory that yawns are contagious.
Often times, yawns are a sign of fatigue or boredom. But the true meaning of why people yawn has stumped researchers.
“What a yawn is good for, we don’t really know,” said Mary Klink, associate director of University of Wisconsin Health’s Wisconsin Sleep.