One of the most common yet enigmatic human actions is yawning. When we're bored, exhausted, or even just notice someone else yawning, we do it. Excessive yawning is usually innocuous, but ...

Born in Fort Lauderdale, Florida, Sandy Yawn attended high school in Brandon before going to get her degree for marine training at the Maritime Professional Training Institute in her hometown.

But why? Surely we cannot all be that tired. The truth is the science behind yawning is much more complex than just a few hours too little sleep. Even more complex? Why we seem to yawn because ...