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 ...

Humans’ first experience with yawning happens in utero, says Matthew D. Epstein, M.D., associate medical director of the Atlantic Health Sleep Centers in New Jersey. Yet, Earth-side, the ...

Merely thinking about or seeing someone yawn can make you yawn (you’re probably yawning right now). Most people yawn because they’re tired, but it can also happen unexpectedly and without any triggers ...

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 ...