Studies suggest that yawning in the womb is an indicator of a baby's health. Yawning is also quite contagious. We all tend to yawn when we see, hear, or sometimes even when we think about it.

Are you yawning yet? Thought so. Infectious yawns are as frustrating as they are intriguing. Sometimes it's enough to need to see someone yawn, hear them talk about it or even read about it for ...