Excessive yawning and nodding off in dull meetings at work can be serious signs of sleepiness, experts say. (Basak Gurbuz Derma, Moment RF, Getty Images via CNN ) ...

'Real Housewives' star Tamra Judge addresses backlash over Autism claim James Gunn Stands Firm on “Superman” Movie's Political Message, Tells Critics: 'Screw Them' Taylor vs Serrano 3 didn’t live up ...

After a hearty lunch at work, you and your co-workers go into a meeting. First one colleague starts to yawn, then a second and finally it's your turn. Many biological explanations have been put ...

The science behind yawning and its mysterious behavior 03:38. Humans aren't alone when it comes to yawning — all vertebrates do it too, including fish, amphibians, reptiles, birds and mammals ...

Excessive yawning and nodding off in dull work meetings at work can be serious signs of sleepiness, experts say. Basak Gurbuz Derma/Moment RF/Getty Images “Nodding off in boring meetings is an ...

One yawn, a second, a third and it’s your turn. Many biological explanations have been put forward, ... After a hearty lunch at work, you and your co-workers go into a meeting.