Dear Matthew Alice: Why don’t I feel the urge to yawn when I watch my cats yawning? I can’t get them to yawn either. Is yawning only contagious to the human race? — Carol Wilson, …
May 6, 1993
Posted May 6, 1993
Dear Matthew Alice: Why don’t I feel the urge to yawn when I watch my cats yawning? I can’t get them to yawn either. Is yawning only contagious to the human race? — Carol Wilson, …