It's Definitely Contagious!

H1N1?
the common cold?
measles?

NYET!

Yawning!

RAH yawned; I yawned. So, I wondered.....

Is yawning contagious?
Thanks to that modern marvel called Google, I found this:

Researchers recently found that yawning isn’t only catching among people; it is also among chimpanzees. No one has devised a fully convincing explanation of why. Compounding the mystery is the odd way in which the contagious power of yawning is largely unconscious. We can see someone yawn, replicate the action ourselves, and do it, all without thinking about it. Other times we’re aware it is happening, though it still floats somewhere beneath the realm of reason and of purposeful actions.