Yawning is usually brushed off as a harmless sign of sleepiness, boredom, or lack of focus. In truth, it plays an important ...

Find yourself yawning a lot? Do you need that third or fourth cup of coffee to make it through the afternoon at work? Such signs of sleepiness may be a red flag of a serious sleep deficit that could ...

Confidential list of behaviors watched by TSA agents was recently leaked online. A TSA document lists exaggerated yawning as a suspicious traveler behavior. Getty Images — -- Excessive yawning, ...

Sign up for CNN’s Sleep, But Better newsletter series. Our seven-part guide has helpful hints to achieve better sleep. Find yourself yawning a lot? Do you need that ...

A new list says "excessive yawning," "whistling" and "too much laughter" could get you into trouble with airport security agents. Those gestures, along with "disguises," "face pale from recent shaving ...

(CNN) — Find yourself yawning a lot? Do you need that third or fourth cup of coffee to make it through the afternoon at work? Such signs of sleepiness may be a red flag of a serious sleep deficit that ...