Thread: I've always wondered.

Originally Posted by POD

Yes it does, and it doesn't spin at all on the equator. There's a guy in Africa who makes a buck from tourists at the equator, he has a bowl arrangement that drains through a hole, he floats a leaf in it and pulls the plug. Only has to walk 20 meters or so either side of the equator and the leaf spins the opposite way, doesn't spin at all right on the line. Fascinating. Same in meteorology; low-pressure and high-pressure areas rotate in the opposite directions in the northern hemisphere vs southern. Coriolis effect.

There you go Trog, drink on the equator.

Yawning is an attempt to take in more oxygen and wake up.

Originally Posted by V8Ian

There you go Trog, drink on the equator.

A vaguely related topic. Sorry to the folks who aren't on Faecesbook but I don't know how to transpose the link. One of our mod techno wizzes may assist, perhaps?

Charles Braun - Sea story!

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Originally Posted by scarry

Back on topic,if one person yawns,how come every one else around starts yawning?

Good Question, And

Originally Posted by DiscoMick

Yawning is an attempt to take in more oxygen and wake up.

Poppycock.

The reason you yawn is to equalize the pressure between the internal sections of the ear and the outside sections (basically balancing the ear drum which is why sometimes when you cant get a normal Valsalva to work you can pull it off by enacting a yawn)

Now when you equalize your ears by yawning the shape of your ear drum changes, as this has an immediate effect on the volume of the air this causes the air pressure to change. This change in air pressure means that someone else's ears need to adjust as their ears are now out of balance so they yawn. The air pressure again has changed so the next person along yawns and so the cycle repeats on a negative feed back untill all the people have their ear pressure balanced within what is their acceptable tolerance of the air pressure around them and no further pressure changes occur.

Originally Posted by Blknight.aus

Good Question, And



Poppycock.

The reason you yawn is to equalize the pressure between the internal sections of the ear and the outside sections (basically balancing the ear drum which is why sometimes when you cant get a normal Valsalva to work you can pull it off by enacting a yawn)

Now when you equalize your ears by yawning the shape of your ear drum changes, as this has an immediate effect on the volume of the air this causes the air pressure to change. This change in air pressure means that someone else's ears need to adjust as their ears are now out of balance so they yawn. The air pressure again has changed so the next person along yawns and so the cycle repeats on a negative feed back untill all the people have their ear pressure balanced within what is their acceptable tolerance of the air pressure around them and no further pressure changes occur.

'ear, 'ear

Originally Posted by Blknight.aus

Good Question, And



Poppycock.

The reason you yawn is to equalize the pressure between the internal sections of the ear and the outside sections (basically balancing the ear drum which is why sometimes when you cant get a normal Valsalva to work you can pull it off by enacting a yawn)

Now when you equalize your ears by yawning the shape of your ear drum changes, as this has an immediate effect on the volume of the air this causes the air pressure to change. This change in air pressure means that someone else's ears need to adjust as their ears are now out of balance so they yawn. The air pressure again has changed so the next person along yawns and so the cycle repeats on a negative feed back untill all the people have their ear pressure balanced within what is their acceptable tolerance of the air pressure around them and no further pressure changes occur.

So its got nothing to do with tiredness or boredom?

I am sure many years ago i used to yawn when bored at school,and get a piece of chalk thrown at me by the teacher.


Umm,there is always something to learn..

If you didn’t know when you were born, how old would you be?

January 1 is often choosen as their birth date by people who don't know their birth date. I know several refugees in that situation.