No one is entirely sure why we yawn — it’s one of the questions that still remains a mystery. But that hasn’t stopped scientists from having a few different theories regarding the human urge to yawn.

Yawning, an act so simple yet intriguing, holds a peculiar secret—it's contagious not just between humans but between humans and dogs as well. In our book, The Purest Bond: Understanding the ...

Is it true that human yawns are contagious to dogs? Some dog owners swear that when they yawn, their dog does, too. And they may be right. Contagious yawning is a well-known phenomenon among humans — ...

Yawning seems like such a simple act, yet it holds surprising power over us. Just watching someone yawn — even a stranger — can suddenly trigger the irresistible urge to yawn yourself. Why does this ...

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 ...

Yawning spreads from person to person because our brains are wired for social mirroring. Mirror neurons, empathy and emotional bonding all make contagious yawning more likely, especially among friends ...

Is it true that we yawn when our brains are deprived of oxygen? Most of us can feel a yawn coming on. The muscles in our jaw begin to tighten, our nostrils might flare, and our eyes might tear up as ...

A study has revealed that dogs are likely to yawn when humans do. The Daily Telegraph reports that research presented at the National Ethology Congress in Lisbon shows that the 29 pets used for the ...

Yawning is surprisingly infectious, spreading quickly among friends and family. The researchers have long studied why humans catch each other’s yawns. The phenomenon is linked to empathy, social bonds ...

Yawning isn’t the only bodily function that’s contagious. Japanese scientists have discovered that chimpanzees are more likely to urinate when they see other primates going No. 1 as well, as detailed ...

A new study on "contagious urination" only looked at captive chimpanzees, but researchers suspect the phenomenon may also exist in the wild. Kumamoto Sanctuary If you see or hear someone yawn, you ...