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What Causes Yawning? The Urge to Yawn

Do animals yawn for the same reasons as humans?

Even animals yawn! Is this yawning tiger bored?

Even animals yawn! Is this yawning tiger bored?

What Causes Yawning?

Thanks to Simone Smith for asking the intriguing question, "What triggers yawning?"
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Did you ever wonder what causes yawning? Humans don't have an exclusive on yawning. Animals, birds and reptiles yawn, too! Yawning seems to occur when we are bored, tired or too warm, but the irresistible impulse to yawn can occur when we see other people yawn. Sometimes just thinking about yawning can make us want to yawn! (Are you yawning, yet?)

In high school, a friend and I were in a rather boring class. To keep ourselves entertained, my friend would choose inopportune moments to face me and give out a huge yawn. Before I knew it, I was yawning uncontrollably, and anyone who was looking at either one of us was yawning, too! I'm sure this didn't inspire the teacher to be more interesting, but it did set off a few giggles in the classroom.


Facts about yawning

  • The average yawn lasts only 6 seconds.
  • Contagious yawning is a way of showing empathy for another person. It is thought to be a way of keep a group alert to danger. In the case of my friend, it alerted the group to boring.
  • All vertebrates yawn, but not all have the contagious yawn response. Try it with your dog...will he yawn if he sees you yawn?
  • Yawning can raise heart rate up to 30%.
  • You don't have to see a yawn to want to yawn. Reading about yawning or hearing someone yawn on the telephone can trigger a yawn. Blind and deaf people will respond to contagious yawning!
  • 55% of all people yawn within five minutes of seeing someone else yawn.
  • Autistic and schizophrenic people are not contagious to yawning.
  • Hot brain? Yawning may be triggered when the brain temperature needs cooling.
  • Sleep deprivation and fatigue increase deep brain temperature, so yawning to cool off the brain when you are tired makes sense.
  • Infants and young children yawn, but are not contagious yawners. They won't yawn in response to seeing someone else yawn.
  • One school of thought has it that yawning is triggered when glucose in the brain is reduced. So yawning may be a result of hunger.
  • It has been said that yawning is caused by the body's need for more oxygen, but the flaw here is that yawning does not bring as much oxygen into the system as normal respiration.
  • Activation of certain chemicals in the brain can increase the frequency of yawning.
  • Excessive yawning can be an indication of certain diseases like cardiovascular disease, electrolysis imbalance, hormonal imbalance or a side effect of medication.
  • Dehydration can cause yawning.

The Art of Pandiculation - Yawning!

Yawning, A Self portrait by Joseph Ducreux (1735–1802)

Yawning, A Self portrait by Joseph Ducreux (1735–1802)

Do you Pandiculate?

What? No, I never!

...or do you just yawn?

Well, maybe you'd admit it if you knew that pandiculation is the act of yawning, contracting and stretching muscles simultaneously!

This self portrait by Joseph Ducreux is a perfect picture of someone in the process of pandiculation.

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How to hide or suppress a yawn

Yawning can take you by surprise and pop up at the most inopportune times. It's fine to yawn when you wake up in the morning or before going to bed, but you really don't want to yawn at a job interview, a funeral or when your spouse is telling you about his or her day. We can't always avoid those triggers that cause us to yawn, so what can we do when yawning is just not appropriate?

Here are a few tips on how to hide a yawn or suppress a yawn:

  • Drink a glass of water to help suppress a yawn. Dehydration can cause an increase in yawning.
  • Pretend you dropped something on the floor and let the yawn out as you pick it up.
  • Cover your mouth with your hands to try to hide the yawn.
  • Pretend you heard a noise behind you and turn your head. Yawn quick while you're facing away.
  • Try holding your breath until it passes.
  • Clench your jaw and keep your mouth shut until the feeling passes. (Don't kid yourself, this fools no one!)
  • If it looks like someone else is going to yawn, look the other way. You know yawing is contagious!



But there are so many other things that make me yawn!

Let's face it, people, we all have triggers that make us yawn or make us wish we could yawn because a yawn would be more interesting than what we're doing at the moment.

Here are 25 things that cause me to yawn!

  1. Political advertisements on TV.
  2. Hearing about your politics (unless they are the same as mine).
  3. PBS fund drives.
  4. Hearing about your operation.
  5. A monologue in a monotone.
  6. Some people (you don't even know who you are, do you?) make me yawn just at the sight of them!
  7. Watching a friends' home movies of their kids' school plays.
  8. Hearing about your pregnancy.
  9. Hearing about your 26 hours in labor. (My 26 hours of labor where SO much more interesting!)
  10. Talking about budgets when outgo is more than income.
  11. Talking about how to remove stains from carpets.
  12. Hearing about all the cute things that your niece/child/grandchild did last weekend.
  13. Seeing someone yawn.
  14. Hearing someone yawn.
  15. Reading about someone yawning.
  16. Curling up in front of a fire alone.
  17. Shopping for clothes for my girlfriend but not for myself.
  18. Coming home from a shopping trip when someone else is driving.
  19. Knowing that there is a sink full of dishes waiting when I get home from shopping.
  20. Listening to someone talk non-stop for 45 minutes about how she hates her life.
  21. Daylight Savings Time.
  22. Changing back to Standard Time.
  23. Reading a boring book in bed.
  24. Hearing about how you went off your diet.
  25. Reading this article. (Oops! it must be seeing the word "yawn" so many times!)

What makes you yawn?

Are you a yawner? Do you yawn whenever you see a friend yawn, or do yawn just reading about yawning? Have any good solutions for suppressing unwanted yawns?

I'd love to hear your comments!

Questions & Answers

Question: Is yawning when you’re hungry normal?

Answer: Different people have different triggers for yawning. I would guess that hunger could be a yawning trigger in some people.

Comments

Stephanie Henkel (author) from USA on April 22, 2015:

Chuckandus6 - Thanks! Glad you enjoyed it. Funnily enough, I had a couple of days of uncontrollable yawing recently...haven't pinpointed the cause, yet. Perhaps I'm boring myself?

Nichol marie from The Country-Side on April 22, 2015:

Great hub and so many fun facts,very original,look forward to reading more of your hubs voted up!

Stephanie Henkel (author) from USA on September 10, 2012:

KDuBarry03 - Isn't contagious yawning something else? I think I've yawned every time I've replied to a comment here...oh, oh, here I go again... :)

KDuBarry03 on September 10, 2012:

I can see why this got HOTD...I had to have yawned at least over ten times! Great read and very interesting, Steph!

Stephanie Henkel (author) from USA on September 10, 2012:

Cogerson - I'm so glad that you found this interesting and informative. I'm sure it also made you yawn...hope that was a good thing! Thanks so much for your comments and for sharing!

UltimateMovieRankings from Virginia on September 10, 2012:

A very impressive former hub of the day.....it is amazing how little I knew about such a common thing as yawning.....thanks for an informative and entertaining hub. Voted up and interesting.

Stephanie Henkel (author) from USA on September 10, 2012:

Made and Jools99 - Thanks for your kind comments - I'm glad you found it interesting and useful.

Stephanie Henkel (author) from USA on September 10, 2012:

Levertis Steele - So yawning tigers trigger your yawns? :) I agree that we often react to things by reciprocating...good point. Now, before I start uncontrollable yawing, let me thank you for stopping in to comment!

Janine Huldie - Thanks so much Janine! It's bad enough to have to sit through a boring class, no less have your friends encourage the yawning! Glad you enjoyed the article. Thanks for the votes and shares!

Rcrumple - Glad to hear that the article stimulated you, but watch out for the delayed reaction! Thanks for stopping in!

nanderson500 - I know that I am very prone to contagious yawning. I'm having a hard time not yawning just answering the comments here!

Jools Hogg from North-East UK on September 10, 2012:

Just looking at the yawners on this page made me yawn :o) Interesting hub.

Madeleine Salin from Finland on September 10, 2012:

First of all, congrats on the HOTD! You have done a great job writing this hub. It was very interesting and useful. I didn't know much about yawning but I learned much by reading your hub. I don't know how to stop yawning now. :)

James Kenny from Birmingham, England on September 10, 2012:

What a fascinating hub! I tend to yawn mostly when I'm at work. I always assumed that I yawned because I was bored. But reading this made me realise that I probably yawn because my brain needs to cool down, because I essentially work inside a greenhouse which can get very hot at times. Thanks for this Stephanie. Voted up etc.

Rema T V from Chennai, India on September 10, 2012:

Hi Stephanie,

We yawn several times a day (especially when someone else yawns) yet never give it any more thought, but you have handled this simple topic so beautifully and given your readers a lot of information. Thank you. Sharing it all over the place. Cheers, Rema.

Joshua Nyamache from Kenya on September 10, 2012:

I yawn when I'm hungry or bored. But there are a times I yawn without any reason, perhaps it is natural.

Melanie Chisnall from Cape Town, South Africa on September 09, 2012:

This is an excellent article! And, no - it didn't make me yawn! It was long enough with interesting facts and information, yet short enough to keep me entertained. Thanks for a great article! Well worth of the HOTD! :)

nanderson500 from Seattle, WA on September 09, 2012:

It's truly amazing how contagious yawning is! I feel like yawning too!

Rich from Kentucky on September 09, 2012:

I didn't yawn once while reading about yawns. I think something's wrong with me. I still have a pulse, so I'm not dead. Perhaps, I was simply stimulated by the article! That has to be it! Great Job!

Janine Huldie from New York, New York on September 09, 2012:

Hi Stephanie, finally made it here after my long day and of course the one of the first words I read, 'yawn' makes me indeed do that!! Seriously loved this article and your story about high school and your friend did bring back some memories for me as well, because I truly did have some amazingly boring teachers, who could trigger the yawn in just about anyone. Great job here and I of course voted, shared and tweeted too!!

Levertis Steele from Southern Clime on September 09, 2012:

I read your topic, looked at your tiger, and yawned. So, yawning triggers yawning. Fatigue does, too. By the time I finished reading your hub, I had yawned about 10 times, and I am still yawning. I am also more relaxed. Another yawn. Sometimes we react to things by reciprocating. Laughter makes me laugh. Sadness makes me sad. Love makes me love. Yawning makes me yawn. Another yawn and another.

Thanks for a yawning good time. Another yawn , , , ,

Stephanie Henkel (author) from USA on September 09, 2012:

Nell Rose - Now that I've imagined you yawning, I'm trying to suppress a yawn, too! Isn't it odd? Thanks for stopping by to read and yawn!

Nell Rose from England on September 09, 2012:

Hi Stephanie, I tried desperately not to yawn when I read the word yawn, but no, it happened! lol! strange isn't it? fascinating hub, and so interesting, I did read that it was caused by lack of oxygen as you said, but yes it doesn't really make sense, wonderful, and yes I just yawned again! lol!

Stephanie Henkel (author) from USA on June 26, 2012:

Tillsontitan - No need to feel guilty when you yawn - it's an involuntary response to any of a number of triggers. Just enjoy that morning pandiculation! :)

Mary Craig from New York on June 26, 2012:

Hmm, pandiculation in the morning and contagious yawning in the afternoon?

Very interesting information Stephanie. Seems everyone has a theory about yawning so its nice to know some facts and judging by the comments you've gotten it looks like lots of folks agree...good hub, good info! Now I won't feel so guilty when I yawn.

Voted up, useful and interesting.

Stephanie Henkel (author) from USA on June 21, 2012:

Denise Handlon - Thanks Denise! I know with your hectic schedule you probably have a few more reasons to yawn - glad that this gave you a smile!

Denise Handlon from North Carolina on June 21, 2012:

Hi Stephanie-GREAT HUB-had me intrigued and smiling all the way. Not sure how I missed the first round, but was glad to see it posted as the HOTD a few days back. It was truly enjoyable. I love the humor/information mix you offer in your writing. :) Up and AWESOME

Stephanie Henkel (author) from USA on June 19, 2012:

Old Empresario - I would imagine that yawning in a pressurized airplane with head congestion would be painful! Luckily, most of our yawning goes on under better, and more relaxed, conditions.

Stephanie Henkel (author) from USA on June 19, 2012:

haikutwinkle - Hmmm...a Haiku about pandiculation...now that will be something new and different! :)

Stephanie Henkel (author) from USA on June 19, 2012:

Ayman - I'm glad you found my article about yawning informative! Thanks for visiting my hub and for your comments!

Ayman on June 19, 2012:

I always intended to know about yawning.......Thanks to your hub i got my answers.....Gr8 work.

haikutwinkle on June 19, 2012:

I like the 'Art of Pandiculation' ... inspires me to write a Haiku about it ;)

Old Empresario on June 18, 2012:

Thanks for writing this interesting essay on something we all have in common, but rarely think about. I always thought the body's physical reason for yawning might have something to do with the inner ear or our making our ears more prepared to hear distant sounds. If you're in a pressurized airplane at 30,000 ft and have a cold with head congestion and your ears need to pop, you may find yawning very difficult.

Stephanie Henkel (author) from USA on June 18, 2012:

Shutupandstudy - I first heard the word "pandiculate" while researching this article. It's always fun to learn new vocabulary!

Stephanie Henkel (author) from USA on June 17, 2012:

DzyMsLizzy - I never thought about posture playing a part in the need to yawn, but it makes sense when you think that poor posture might inhibit oxygen intake... good point!

Stephanie Henkel (author) from USA on June 17, 2012:

Ambyotic - I'm so glad you enjoyed my hub on causes of yawning! Thanks so much for your comments and votes!

Stephanie Henkel (author) from USA on June 17, 2012:

Daughter of Maat - Doesn't it seem that the harder you try not to yawn, the more you want to do it? Hahaha...so you did the pooch test for contagious yawning? Thanks for stopping by to read and comment!

Stephanie Henkel (author) from USA on June 17, 2012:

fpherj48 - How great that your grandson is so curious! I hope he enjoys the facts about yawning. I'll bet he tries to get everyone around him to yawn contagiously! :) Thanks so much for stopping by to read and for your comments!

Suzie from Carson City on June 17, 2012:

Stephanie.....This is great! Just the other day, my 10 yr. old grandson was discussing yawning and sneezing! He asked me how much I knew about either........he's quite the mature little genius. Sure wish I'd have read this hub before then! Next time he's here, I'll have him read your hub. He'll love it.

I yawn a lot real early in the a.m. right after getting out of bed....I wake up slowly.......very slowly. I think that's commonly referred to as "not a morning person.".......Then I begin to yawn after a busy day and evening...which is my signal, I guess, that it's time for Night-night!!

Like this hub very much! UP +++

Melissa Flagg COA OSC from Rural Central Florida on June 16, 2012:

Dang it, I tried so hard not to yawn while reading this!! Dang it, there I go again!! This was a fantastic hub, and I actually learned quite a bit. Voted up and shared!! (PS: my dog is a contagious yawner! lol)

Liz Elias from Oakley, CA on June 16, 2012:

P.S. I'm thinking it may also have something to do with not breathing correctly, or improper posture that inhibits full breaths? Because I have found that I cannot read aloud without yawning about every other sentence. It made it nearly impossible to do the wonderful reading to my kids that my mom did for me.....

Ambyotic from New Hampshire on June 16, 2012:

What a great idea for a Hub! And very well thought out and entertaining :) I loved your fact section... I learned so much (and didn't get bored)! Many, many ups and likes!

Stephanie Henkel (author) from USA on June 16, 2012:

Mary615 - I'm so glad you found my hub and enjoyed it! Thanks so much for your comments and votes!

Stephanie Henkel (author) from USA on June 16, 2012:

rebeccamealey - I'm so glad you found my article on yawning interesting. Thanks so much for your very kind comments!

Stephanie Henkel (author) from USA on June 16, 2012:

Homesteadbound - Glad you enjoyed my hub about yawning! Thanks for your comment and well wishes!

Stephanie Henkel (author) from USA on June 16, 2012:

Kelley1987 - I was also surprised that young children aren't contagious yawners. It does make you want to go out and test this, doesn't it? :)

Stephanie Henkel (author) from USA on June 16, 2012:

Ann810 - It's been interesting to hear how many times people yawn while reading my article on yawning. If I didn't know that yawning is contagious, even when reading about it, I might be concerned! :) Thanks for stopping in to read and comment!

Stephanie Henkel (author) from USA on June 16, 2012:

Sunshine625 - Awww...don't be afraid of the cute pussycat! :) Thanks so much for stopping in to read and comment on my hub!

Stephanie Henkel (author) from USA on June 16, 2012:

DzyMsLizzy - Glad you found this article interesting even if it did set off bouts of yawning! I can believe that yawning is an attempt to stay focused. Gosh, it must be tough to be a teacher and see students yawning. How do you stop yourself from yawning in return? :) Thanks for the comment and thanks for the good wishes!

Stephanie Henkel (author) from USA on June 16, 2012:

Nettlemore - Yawning when anxious...that's an interesting reaction. Now I'm also curious to know if others yawn while anxious. We'll do our own yawn study!

Stephanie Henkel (author) from USA on June 16, 2012:

Audrey Howitt - Haha...hope it didn't put you to sleep! Thanks for stopping by to read! :)

Linda Bilyeu from Orlando, FL on June 16, 2012:

I usually yawn when I'm tired because I'm sleep deprived. Thanks for the tips and info on why I really could be yawning. I know for sure I would never run if I ever bumped into a tiger such as your photo...I'd run like heck! Congrats on your HOD!:)

Ann810 from Sunny Cali on June 16, 2012:

Hi Stephanie, Very well written article. Guess yawning is contagious in some cases; I yawned about 5 times just reading this very interesting article. Voted up, thanks.

Mary Hyatt from Florida on June 16, 2012:

Congrats on HOTD! I don't know how I missed this one before, but I enjoyed it this time around! I love your reasons to yawn. I voted this UP, etc.

Rebecca Mealey from Northeastern Georgia, USA on June 16, 2012:

How interesting. Can't yawn from boredom on this one. Particularly intriguing is the fact about the autistic not responding to yawns, so this would be a by product of a communication disorder. Congrats on your honor. What a fantastic Hub!

Cindy Murdoch from Texas on June 16, 2012:

I am fighting the desire to yawn right now, and have since I started reading. I wonder if I will make it thru the next five minutes.

And it won't be cause this was a boring topic. I thoroughly enjoyed this hub. Great answer to a great question. Congratulations on hub of the day!

Kelley1987 from Georgia on June 16, 2012:

I really liked this hub, very interesting! I also yawned four times reading this :), I couldn't just help myself. Oops, just yawned a fifth time. Great article and the pandiculation picture is hilarious. I was also very surprised to find out that infants and small children are not contagious yawners. Next time I am around a small child, I may test this fact out on them ;)

Liz Elias from Oakley, CA on June 16, 2012:

I have heard that it is an attempt to stay focused, even if bored...(could explain all the classroom yawning.. ) ;-)

Unfortunately, I am one of those susceptible to the contagion of yawning, so this article had me doing it quite a bit as I read and re-read the word! Ugh!

That's not to say your article was boring--it was, in fact, most interesting.

Congrats on HOTD--Voted up across the board!

Nettlemere from Burnley, Lancashire, UK on June 16, 2012:

Love the word pandiculate, I hope to remember that. I yawn when I'm particularly anxious to the extent of making my eyes water sometimes. I've only (knowingly) met one other person that yawn with anxiety and would be interested to know if it affects other readers.

JS Matthew from Massachusetts, USA on June 16, 2012:

Your welcome! I enjoyed the article and found it very interesting! JS~

Audrey Howitt from California on June 16, 2012:

Congrats! Reading about yawning made me yawn!!

Stephanie Henkel (author) from USA on June 16, 2012:

J.S.Matthew - Haha...you even counted your yawns? I wonder if the number of yawns directly relates to the interest in this article? :) Thanks so much for you kind comments and for the share!

Stephanie Henkel (author) from USA on June 16, 2012:

Pstraubie48 - Yawning and talking about yawning does trigger more yawning...I'm fighting a yawn right now! Thanks so much for the read and the pin!

JS Matthew from Massachusetts, USA on June 16, 2012:

I just yawned at least 6 times while reading this (and not because this was boring!) What an awesome educational Hub! I like the facts and reasons for yawning. Congratulations on the Hub of the Day! Well deserved! Up and shared.

JSMatthew~

Patricia Scott from North Central Florida on June 16, 2012:

One thing is certain....seeing that yawn ....makes me want to

Y A W N

Cool picture for sure.

You pretty well covered all of the yawning triggers, Stephanie. I am yawning now as I find the power of suggestion a trigger that makes me yawn.

Congrats for you on Hub of the Day and pinned.

Stephanie Henkel (author) from USA on June 16, 2012:

Victoria Lynn - Glad that you found my hub on yawning informative and funny! Thanks so much for your comment and good wishes!

Stephanie Henkel (author) from USA on June 16, 2012:

Vinaya Ghimire - I was surprised, too, at the different reasons for yawning. Thanks for stopping in to comment and for your congratulations! I was so pleased to see this hub selected as hub of the day!

Stephanie Henkel (author) from USA on June 16, 2012:

Diggnet - Glad you enjoyed my hub on What causes yawning. Thanks for your comment!

Stephanie Henkel (author) from USA on June 16, 2012:

Jools99 - Thanks for stopping by to read and comment! I appreciate the votes and the share! :)

Stephanie Henkel (author) from USA on June 16, 2012:

Poshcoffeco - Thanks for the congrats and your comment. Linking is good...let's do! :)

diggnet from US on June 16, 2012:

Hahaaa its so funny :))

Stephanie Henkel (author) from USA on June 16, 2012:

Dragupine - I'm so glad you enjoyed my hub on What Causes Yawning! Thanks for the read and for your comment!

dragupine on June 16, 2012:

that is so cool. Thank you for sharing this awesome and informative hub!

Steve Mitchell from Cambridgeshire on June 16, 2012:

Hey Stephanie,

congratulations on your Hub of The Day.......awesome. I wrote a hub, ( not as concise as this on I must admit). Let me know and we could link up?

Jools Hogg from North-East UK on June 16, 2012:

Stephanie, informative and fun! Voted up and shared.

Vinaya Ghimire from Nepal on June 16, 2012:

I always thought lack of oxygen inside our lungs makes us yawn. But it is interesting to note that there are more reasons.

Stephanie, congrats for well deserved hub of the day.

Victoria Lynn from Arkansas, USA on June 16, 2012:

Informative and humorous. Way to go on Hub of the Day!

Stephanie Henkel (author) from USA on June 16, 2012:

Marcy Goodfleisch - Isn't it amazing that just the word "yawn" can make us visualize yawning...and then make us powerless to suppress our yawns! Thanks for the congrats and for stopping by to comment...and pandiculate a bit!

Stephanie Henkel (author) from USA on June 16, 2012:

Ktrapp - That giant tiger yawn can get anyone yawning, can't it? Thanks for your well wishes and your great comments. I was pleased and surprised to see my hub awarded HOTD this morning! Now THAT woke me up! :)

Stephanie Henkel (author) from USA on June 16, 2012:

Whonunuwho - It's interesting that your dogs yawn when they feel secure in your lap. Perhaps it's a form of empathy with you if you are feeling content and secure while they are close to you? Thanks for stopping in to comment!

Stephanie Henkel (author) from USA on June 16, 2012:

ComfortB - Thanks for sharing your comments and yawns! Glad I could have something to do with both! :)

Stephanie Henkel (author) from USA on June 16, 2012:

Kelleyward - Glad you found something new and interesting in my yawning hub, Kelley! Thanks so much for our comments and congrats!

kelleyward on June 16, 2012:

Fantastic hub Stephanie! I'd heard of some of these causes for yawning before but many you presented here were new to me. Congrats on the HOTD!! Take care, Kelley

Comfort Babatola from Bonaire, GA, USA on June 16, 2012:

I just couldn't help but yawn (didn't keep a count) all through the reading of this hub. You triggered it!

Thanks for sharing (yawning again), and congrats on the HOTD award!

whonunuwho from United States on June 16, 2012:

My dogs yawn when the seem to sense contentment and security, as when the sit in my lap. When I see others yawn, it makes me have the impulse to do so. I have heard that it is also the body's way in supplying needed oxygen and may occur when we are deprived of same.

Kristin Trapp from Illinois on June 16, 2012:

I have been yawning ever since I saw that yawning tiger/Hub of the Day photo and the whole time I read this really interesting hub. I've always considered myself a contagious yawner; within seconds of seeing a yawn or hearing or reading about yawning, I yawn. As a matter of fact, the thought of yawning makes me yawn. And the more I type the word "yawn" I realize it is as odd sounding as pandiculation. Fun and interesting hub. Congrats on HOTD!

Marcy Goodfleisch from Planet Earth on June 16, 2012:

Okay, Steph - now how do I quit yawning after reading the word (power of suggestion) and seeing the pictures here? Congrats on your HOTD! Fun and interesting hub!

Excuse me while I continue my morning pandiculation!

Stephanie Henkel (author) from USA on June 16, 2012:

CCahill - Glad to hear that you've found some new information in my hub! Pandiculation was new to me, too. Now that I've added it to my vocabulary, I just wish I could use it in Scrabble sometime...a little too long, perhaps... Thanks so much for stopping in to read and comment!

Stephanie Henkel (author) from USA on June 16, 2012:

Tsmog - Thanks so much for the congratulations and for your thoughtful comments! Who can yawn while smiling? And I'm smiling now at your comments! :)

CCahill from England on June 16, 2012:

Well ive learnt a new word. Pandiculation!

Tim Mitchell from Escondido, CA on June 16, 2012:

Congratulations. Awesome article inspiring one to pause and consider the yawn. A very informative hub offering both intrigue and facts supporting that mystery most overlook. I would think those who read this will be watching for the yawn as the day progresses. I like humor proposed with the solutions, yet it is the garden that changes a yawn to a smile. Have a great day, Stephanie and thank you for the contribution . . .

Stephanie Henkel (author) from USA on June 16, 2012:

Happyboomernurse - Glad you liked the tiger picture! I loved it when I came across it, and thought it would be so much more interesting than a human in the midst of a yawn! Thanks so much for stopping by to read and comment! I appreciate your votes and well wishes!

Stephanie Henkel (author) from USA on June 16, 2012:

RTalloni - I guess I should have added an "all of the above" option to my poll! I agree, waiting makes me yawn...I'm not a patient waiter! Thanks for stopping by to comment!

Stephanie Henkel (author) from USA on June 16, 2012:

Cathleena Beams - Thanks for holding off on yawning till after you read my article - I noticed that many here just yawned right on through it! :) Glad you enjoyed; thanks for your comments!

Stephanie Henkel (author) from USA on June 16, 2012:

Mandarmk9 - There are several conflicting theories about the causes of yawning, but one thing is certain - it's contagious! Glad you enjoyed my hub. Thanks for your comments!

Stephanie Henkel (author) from USA on June 16, 2012:

Christin53 - Thanks so much for the read and your comment! I think I can add one more thing to the list of things that cause people to yawn! :)

Stephanie Henkel (author) from USA on June 16, 2012:

mwilliams66 - Thanks so much for your comments and well wishes! As long as the yawning frenzy doesn't lead to people nodding off while reading, I guess it's o.k. :) Glad you found this enjoyable!

Stephanie Henkel (author) from USA on June 16, 2012:

Jennifer Stone - Thanks for the congrats and for your comments! Just reading all these "yawn" words is about to set me off on a yawning spree! :)

Gail Sobotkin from South Carolina on June 16, 2012:

The tiger picture drew me in and the interesting facts and photos held my interest all the way through (but still triggered several yawns which I assume were of the contagious variety!) LOL

I also discovered that I'm a pandiculate yawner as I love to stretch during a yawn unless I'm trying to suppress it so I don't offend anyone.

Voted up across the board. Congrats on earning HOTD.

Stephanie Henkel (author) from USA on June 16, 2012:

Sammimills - I know I've tried not to yawn when I see someone yawning at inappropriate times, but it's almost impossible! Thanks for your comment!

Stephanie Henkel (author) from USA on June 16, 2012:

Yaswanthk - Hahaha! Sorry I inspired you to yawn! :) That is a side effect when one reads about yawning... But thanks for staying awake long enough to comment! :)

RTalloni on June 16, 2012:

Fun stuff--but no fair making a poll where we can vote on only one of three that are all equal choices! :)

Waiting is another thing that makes me yawn.

Ann-Christin from UK on June 16, 2012:

Brilliant hub it did rather make me yawn though :)

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