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Why are yawns contagious ?
When people yawn , you see that other people in the room yawn , too .
Why is that ?
When your body need more oxygen , you yawn .
When you yawn , you take more oxygen in the air .
If the density of the oxygen in the air becomes lower , other people ( their bodies ) can feel that and start to yawn to get more oxygen .
That 's why yawns are contagious .
Yawning is extremely contagious -- 55 % of people who witness someone yawn will yawn within five minutes .
If a visually impaired person hears a tape of someone yawning , he or she is likely to yawn as well .
Face it , the likelihood of you making it to the end of this answer without looking like one of these is unlikely .
Although the contagious nature of yawning is well established , we know less about why this is so .
Researchers are currently giving the topic some serious attention .
One theory suggests it 's a from a period in evolutionary history when yawning served to coordinate the social behavior of a group of animals .
A recent study postulates that contagious yawning could be part of the " neural network involved in empathy . "
While the mystery of contagious yawning has yet to be solved , perhaps researchers are closing in on an answer .
On the other hand , given the subject matter , we would n't blame them for falling asleep at the wheel .
In the meantime , give the " yawn challenge " a try -- it 's tougher than it looks .
label: Education & Reference
predict: Science & Mathematics
why does n't an optical mouse work on a glass table ? or even on some surfaces ?
Optical mice use an LED and a camera to rapidly capture images of the surface beneath the mouse .
The infomation from the camera is analyzed by a ( Digital Signal Processor ) and used to detect imperfections in the underlying surface and determine motion .
Some materials , such as glass , mirrors or other very shiny , uniform surfaces interfere with the ability of the to accurately analyze the surface beneath the mouse .
Since glass is transparent and very uniform , the mouse is unable to pick up enough imperfections in the underlying surface to determine motion .
surfaces are also a problem , since they constantly reflect back the same image , causing the not to recognize motion properly .
When the system is unable to see surface changes associated with movement , the mouse will not work properly .
label: Computers & Internet
predict: Science & Mathematics
What is the best off - road motorcycle trail ?
long - distance trail throughout CA i hear that the road is for it online .
label: Sports
predict: Sports
What is Trans Fat ?
How to reduce that ?
I heard that fat is bad for the body .
Why is that ?
Where can we find it in our daily food ?
Trans fats occur in manufactured foods during the process of partial , when hydrogen gas is through vegetable oil to increase shelf life and stabilize the original oil .
The resulting fat is similar to saturated fat , which raises " bad " LDL cholesterol and can lead to clogged arteries and heart disease .
Until very recently , food labels were not required to list trans fats , and this health risk remained hidden to consumers .
In early July , FDA regulations changed , and food labels will soon begin identifying trans fat content in processed foods .
label: Health
predict: Health
Roth IRA Vs 401 K ?
what is the difference between Roth IRA and 401 K ?
When should I prefer one over the other ?
If your company has 401 K benefit , you should join it because the money you deposit into the account does n't need to pay tax at that time ( more than
Roth IRA is after - tax and has some restriction .
You wo n't be able to use Roth if your income is higher than certain amount .
Also , you need to pay tax for those amount .
Only the capital gain is not .
If your company has 401 K , I suggest that you use
If you do n't work in certain year , then use Roth IRA to leverage the tax .
label: Business & Finance
predict: Business & Finance
Style Sheets
What are the pros and cons for web developers when using CSS PRO : CSS is designed to allow the separation of presentation and structure .
colors , background styles , element , borders and sizes are moved into a , resulting in considerably simpler HTML code .
The HTML documents become much smaller and web browsers will usually cache sites ' CSS .
This leads to a reduction in network traffic and noticeably quicker page downloads .
CON :
Naming can get confusing .
For example , authors might associate the class name with desired attributes ; for example , a CSS class to be applied to emphasized text might be named " ,
While such a choice of naming may be intuitive to the document author , it can cause problems if the author later decides that the emphasized text should instead be green ;
There are bugs in CSS that you need to work out when you need it to work across multiple browsers & platforms , and its harder to debug than with a simple
label: Computers & Internet
predict: Computers & Internet
How many planes Fedex has ?
I heard that it is the largest airline in the world according to the web site : Air Fleet aircraft , including : 47 -
- 36 Boeing - 2 5
Boeing - 30s 29
57 Boeing 18 Boeing 727 - 100s
10 94 Boeing 727 - 246 30 Boeing - 17
label: Business & Finance
predict: Business & Finance
In the san francisco bay area , does it make sense to rent or buy ?
the prices of rent and the price of buying does not make sense to me , mostly the rent will not cover the mortgage .
Is it better to rent a house or to buy ?
renting vs buying depends on your goals .
generally thinking is that buying is better b / c the payments that would go into the rent start building equity in your home .
the govt also you to buy by making your property tax payments and mortgage interest payments tax said that current housing status in the bay area is such that housing
it makes sense to buy vs. other line you should base your decision on whether you think the market will keep going up or not .
the other numbers tend to even out , the main gain or loss in buying comes from appreciation / depreciation .
label: Business & Finance
predict: Business & Finance
Why is it called " Heavy Metal " music ?
Why is it called " Heavy Metal " music ?
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http://en.wikipedia.org / wiki /
The origin of the term heavy metal is uncertain .
An early use of the term was by counter - culture writer William S. Burroughs .
In his 1962 novel The Soft Machine , he introduces the character " Willy , the Heavy Metal Kid " .
His next novel in 1964 Nova Express , develops this theme further , heavy metal being a metaphor for addictive their diseases and orgasm drugs and their sexless parasite life forms
Nova Express .
New York : Grove Press .
p. 112
Given the publication dates of these works it is unlikely that Burroughs had any intent to relate the term to rock music ; however Burroughs ' writing may have influenced later usage
The first use of the term " heavy metal " in a song lyric is the words " heavy metal thunder " in the 1968 song " Born to be Wild
like smoke and metal ' with the
the feelin ' that I 'm word " heavy " ( meaning serious or profound ) had entered / slang some time earlier , and references to " heavy
The fact that Led Zeppelin ( whose moniker came partly in reference to Keith Moon 's that they would " go down like a lead balloon " ) incorporated a heavy
In the late 1960s , Birmingham , England was still a centre of industry and ( given the many rock bands that evolved in and around the city , such as Led
some people suggest that the term Heavy Metal may have some relation to such activity .
of The Move have claimed that the sound came from their ' heavy ' guitar riffs that were popular amongst the ' metal , original producer , manager and
He states that " ... it [ heavy metal ] was a term originated in a New York Times article reviewing a Jimi Hendrix performance " , and claims the author described
The precise source of this claim , however , has not been found and its accuracy is disputed .
The first well - documented usage of the term " heavy metal " referring to a style of music , appears to be the May 1971 issue of , in a
In this review we are told that " Sir Lord Baltimore seems to have down pat most all the best heavy metal tricks in the of its origin , heavy metal
Other , already - established bands , such as Deep Purple , who had origins in pop or progressive rock , immediately took on the heavy metal mantle , adding distortion and
label: Entertainment & Music
predict: Entertainment & Music
what is the best photo slideshow creation application what is the best photo slideshow creation application
I recently tried two products to create an end - of - the - season slideshow for my childrens swim team , 6.1 from Sonic Solution and 3 from
The first product , 6.1 was easy to use , but had an unacceptable flaw and was missing a really great feature .
When creating long ( > 99 slides ) , the software automatically created chapter points .
The problem was , that the audio would drop out at each chapter , creating unpleasant silence at seemingly random intervals in the show ( - 5x during my slide show
Since their customer support had no recommendations on solving the problem , I was forced to look elsewhere .
The second product 3 from Ulead , not only solved that problem , but added a feature that I really think is a " must have " .
The feature , known as the " Ken Burns " effect , subtly or pans the photo within the frame during playback .
This allows a slide show to have a sense of motion .
Everyone that viewed the DVD I created universally liked the effect and commented on the " cool " factor .
The UI for adding multiple audio tracks could be improved , but it does allow frame level control over positioning the audio .
The DVD burning process on a large number of photos took about an hour for 260 photos , which was longer than took for a similar task .
The project templates and menu backgrounds provided for both products were a bit weak for my taste , so I used a custom background for my main menu .
All - in - all 3 did a great job for me .
The slide show was a great success and the audience of - 300 people who viewed it at the end of the season were impressed by the quality
and I got numerous positive comments .
label: Computers & Internet
predict: Computers & Internet
What 's the best way to clean a keyboard ?
I have very small stuff stuck under my keyboard and it prevents it to from working .
What will be the be st way to clean it ?
There are commercial kits available , but a can of compressed air , a lint - free cloth or wipes , mild liquid , and a vacuum cleaner with a soft
After turning off your computer and unplugging your keyboard , gently shake the keyboard upside down over some newspaper to loose crumbs and particles .
Use the can of compressed air to blow a stream of air between the keys .
a lint - free cloth with a diluted solution of liquid and water to wipe down the keys .
Use the vacuum cleaner brush attachment to suck away any remaining dirt or debris .
If you have a membrane - type keyboard ( it does n't have a spring under each key ) and the keys are truly , you can remove the keys with
If you are still feeling , next you can tackle cleaning your mouse .
Of course , if cleaning your keyboard seems a truly undesirable task , you can always buy a new one for around $ 20 .
label: Computers & Internet
predict: Computers & Internet
What is the most important thing you are missing on the internet ?
What is the single most important thing you are missing on the internet ?
I think that the best thing about the internet is that you CAN be anonymous .
I agree that there should be a single identity that a user can use in secured web sites , like banks , but I prefer it to be an identity specific to
Meaning , if you look at the FICO number and what affect it ( being late in the supermarket affect you car insurance )
I rather not repeat that in the internet world .
So my suggestion is to have separate identity to separate categories – the web site will have their own identity database and it will be a different one form the gambling
label: Computers & Internet
predict: Computers & Internet
Why do people blush when they are embarrassed ?
Why do people blush when they are embarrassed ?
from ask yahoo ...
/
is a unique blend of evolutionary and social behavior .
It 's an involuntary reaction of the sympathetic nervous system , which is responsible for our " fight or flight " response , but blushing is solely triggered by social cues .
People generally blush when they 're feeling embarrassed , scared , or stressed .
As a result of the " fight or flight " response , the capillaries that carry blood to the skin widen , and the increased blood flow lends the face , as
Excessive facial blushing , or , is caused by of the sympathetic nervous system .
The condition can cause a lot of psychological duress and has several support groups .
It 's common knowledge that animals do n't blush .
So while there are some evolutionary cues behind blushing , it 's also linked to something uniquely human -- moral consciousness .
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label: Science & Mathematics
predict: Politics & Government
What is happiness ?
What is happiness ?
there is a good wikipedia article on this .
label: Health
predict: Business & Finance
Can boys and girls be just friends ?
Can boys and girls be just friends and never lovers ?
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Please no answer from - When Harry Met Sally .
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Any studies by Kinsey ?
I think he failed this test by the way .....
Boys do n't think so .
Girls do .
Hmmm .
I 've seen this in a movie .
But I do n't think they are mutually exclusive .
Boys can fantasize about being lovers with a girl , and girls can believe that boys " just want to be friends " with them .
Denial works pretty well to keep a friendship together .
label: Family & Relationships
predict: Family & Relationships
Is Lin ( aka Lin ) " the most beautiful woman in Chinese cinema ?
" This is according to Stephen ( ) .
Is it true ?
Who is the best - looking male star ?
Did they make any movies together ?
Well .
Everyone has different definition on what ' beauty ' is .
I like Lin ,
but I think many girls are prettier than she was .
( She is more than 40 years old now ) .
If " Lin " is the most beautiful woman in the Chinese cinema , the most handsome man in Chinese cinema should be " Chin Han " because they always made
However , A male movie star once was asked his girlfriend in real life or the girlfriend in movie is more beautiful .
He gave a very good answer : " I think my mother is the most beautiful woman in the world . "
:)
label: Entertainment & Music
predict: Society & Culture
What is the origin of " " ?
I want to know the meaning of the word and how to explain to my friends .
Not sure if this is the origin , but I think it was popularized in the 1989 film " Tango & Cash " .
After Tango , played by Sylvester Stallone , and Cash , portrayed by Kurt Russell , were thrown into jail and setup in a failed attempt , the bad guy
Prior to a can of whoop - ass , their conversation was as follows :
Gabriel Cash : I do n't know about you , but I have an to getting ...
Ray Tango : What 's Cash :
- Up Beyond All Recognition .
label: Computers & Internet
predict: Society & Culture
How the human species evolved ?
How the human species evolved ?
A tough question as it overlaps science and theology .
Since you asked " how the human species evolved ?
" I 'll assume you 're interested in the scientific approach to the answer .
The current theory holds that Homo sapiens evolved from ancestors over the course of millions of years through a process called natural selection .
Natural selection is the weeding and advancement of species variants over time based on the fit in that species ' then current environments .
The pressures for " fit " are competitive ( with each other , with other tribes , and with other animals ) and environmental ( weather , terrain , availability of food
These factors all contributed to the development of our higher brain , which we now use to evolve as a global collective through communication & technology .
label: Science & Mathematics
predict: Science & Mathematics
What makes friendship click ?
How does the spark keep going ?
good communication is what does it .
Can you move beyond small talk and say what 's really on your mind .
If you start doing this , my expereince is that potentially good friends will respond or shun you .
Then you know who the really good friends are .
label: Family & Relationships
predict: Family & Relationships
Who said the statement below and what does it mean ?
Can someone help me with understanding someone else 's wisdom , please ?
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" It is very easy in the world to live by the opinion of the world .
It is very easy in solitude to be self - centered .
But the finished man is he who in the midst of the crowd keeps with perfect sweetness the independence of solitude . "
That is kind of a tricky little quote .
Sometimes placing it in context can help .
This is a quote from Ralph Waldo Emerson 's essay " Self , " which discourages basing one 's opinions and actions on common opinion in favor of self - trust
I think the point of this quote is that it 's very desireable to have one 's own original thoughts and opinions , and to live by them .
It 's easier to live by one 's own convictions and not be persuaded by others when in isolation
( that 's the " independence of solitude " ) .
However , not so special to isolate oneself from others in order to attain this ideal .
Because it 's difficult to live by one 's own thoughts and opinions while being a part of society , it 's something only a " finished man " can truly do
Also , in the essay , Emerson refers to being - unselfish , non - judgmental , open - minded , , - as something to admire .
So I think that 's where the seemingly misplaced " perfect sweetness " comes in .
When a man can remain pure of heart while living in the harsh world and also keeping and living by his own ideals .
What do you think ?
label: Education & Reference
predict: Society & Culture
How do I find an out of print book ?
When I was a kid
I remember seeing a book that was like an yearbook of all newspapers published by the Times during WW II .
Each of the years is compiled into a different book .
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It gave one a very into the UK the war , and even had advertisements from time .
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Anybody out there know how to track such books ?
There are several websites that you can find rare or out of print books .
A couple would be or .
These sites list books by all over the country and some internationally .
label: Education & Reference
predict: Politics & Government
What are some tips on finding a good mortgage broker ?
What are some tips on finding a good mortgage broker ?
the most basic thing is to have someone you have a decent amount of trust for .
someone recommended by a friend things you have to look for are:1 .
top priority is seeing that the broker can actually get your loan on time .
many deals fall through b / c the broker can not get the deal through on time and has less control than the original .
secondary priority is to see that they have access to competitive rates .
not all brokers have access to all sources and rates , although most of them will be .
you need to see that the broker is someone you trust to get you the best rate regardless of how much money they make off the transaction .
label: Business & Finance
predict: Business & Finance
what 's the best way to create a bootable / dos CD ?
i do n't use floppies any more and need to boot from something other than my hard disk
Well , the best way is to look at whatever program you have for burning CDs and see if it has an option to create a bootable CD .
If you ca n't find it , or use Windows itself to burn CDs , then it 's a little more complicated .
Note : If you find that booting from CD does n't work , you may have to adjust your BIOS setting to allow your machine to boot from you want to
: the easiest way is probably to go here : and download a utility that will do it for you .
There are instructions there depending on what type of boot you want .
If you do n't trust using a third party utility , Microsoft has some instructions here :
.
This process is not very straightforward though .
If you just need to get into your filesystem and poke around , you might consider booting a different OS .
For example , ( ) and ( Knoppix Linux ) may do what you want .
For these , you can download ISO images and burn bootable CDs .
label: Computers & Internet
predict: Computers & Internet
what is the reason for the increasing divorce percentage in the western world ?
what is the most common parameter that causing couples to separate IMO ...
our lives are much more complex than our equivalents from 50 years ago and thus it 's more likely for married people to grow in different directions over time ( values ,
Add to that how easy and acceptable it is to get a divorce , and how quick we are to dispose of things that we no longer want , and you get
I would n't be surprised if in the not too distant future the average length of a marriage drops to years and the average number of marriages per person increases to
( grade school , high school , college , jobs , etc . ) .
We are a nomadic species . :)
label: Family & Relationships
predict: Society & Culture
What is an " imaginary number " ?
What is an " imaginary number " , and how is it treated in algebra equations ?
Imaginary numbers are numbers than when squared equal a negative number , as in = -1 , where i is the imaginary number .
You 'll also often see them represented as i = ( that 's the square root of be confused by the poorly chosen name - imaginary numbers do indeed exist
The analogy that Wikipedia uses is a good one - just like you do n't need the concept of fractions to count stones , it does n't mean that fractions do n't
label: Science & Mathematics
predict: Science & Mathematics
Treatments for ?
My father has gout .
What are the best treatments for it ?
there is no cure for gout
but it can be treated and are some good references
label: Health
predict: Health
a pizza would we be able to fax a pizza in the future ?
How far are we from creating a machine that can beam people from one place to another ?
We 're pretty far away from being able to beam anything in the way that you are describing .
There are some experiments where splitting entangled electrons allows us to observe some interesting ' action at a distance ' effects , but the amount of data that would need to be
Also , such an operation would require nano - that could interpret such data an the pizza from the info provided .
label: Science & Mathematics
predict: Politics & Government
What are good sources to find out about new gospel artists ?
Is there a site that focuses primarily on gospel ?
Magazine or their online website will give you information on up and coming artists in the Christian Music field .
label: Entertainment & Music
predict: Entertainment & Music
Why is Silicon Valley a cultural ?
Silicon Valley is one of the areas of the country , with a highly educated , diverse population .
Why is it a total cultural ?
Why is n't there a , or Andrew Carnegie , or Paul Mellon of Silicon Valley ?
This seems counterintuitive to me .
In short : cars and zoning laws .
Culture is a vaguely defined concept , but in my definition it refers to the creative expression of humanity , i.e. culture opposes nature in that it is what is made ,
Included is the arts , the architecture , the built environment , the civic life of the streets , the events taking place in the community , and cities have traditionally been
Thus your recognition of San Francisco as where the concentration of culture in the Bay Area .
It is a much repeated fact that the entirety of Medieval Florence would fit into one average Phoenix area intersection .
Silicon Valley has the misfortune of having come of age after WWII , and post - WWII " cities " were environments designed for cars and not for people .
Cars insulate people from one another , prevent the fruitful mixing of different classes and different races .
built for cars include parking lots , strip malls , and houses dominated by garages and not front , and front are a big part of street level society
Cars lead to self - segregation almost as much as suburban development does .
development is largely segregated by income level : a $ 100,000 house is never built next to a $ 500,000 house , and god forbid if an apartment building went up
And no one needs to point out that all the houses look more or less the same .
Building a city , in the traditional understanding of what a city comprises , is no longer legal in most parts of the country .
laws of most cities prohibit the building of streets with back , or the culture of the street over the need to park .
It 's not possible to build traditional streets with retail on the first floor , offices on the second , and living spaces above .
It 's not possible to put commerce and residential together .
Even in big cities , there is often a " dead downtown " -- after work
, everyone leaves and the streets die .
You can see an effort to build a New street in the case of Santana Row , in San Jose .
That it feels a lot like a shopping mall the experience somewhat , but if other developers in surrounding blocks picked up the same torch , and mom and pop stores
To read more on the subject check out Nation : The Death of the American Dream by Andres , Elizabeth - and Jeff .
Also read The Death and Life of American Cities by Jane Jacobs , a classic .
And read more on New :
label: Society & Culture
predict: Politics & Government
I want to drink 8 glasses of water everyday as recommended by doctors .
However I feel very bloated after only 3 glasses .
What should I do ?
Try using a squeeze bottle and carrying it around with you .
You can take all day long rather than trying to take in full glasses at one time .
label: Health
predict: Health
space missions Why are we spending so much money on space when we do not have a decent health insurance to all the public ?
You also need to consider the economic effects of funding basic research .
The moon missions of the 60 's inspired an entire generation and helped to move many kids toward careers in science and engineering .
As a result , the US was well to take advantage of the huge boom in information technology in the last few decades .
The net effect of these engineers in the workforce could be see has a pretty impressive return on investment for the cost of those missions .
label: Science & Mathematics
predict: Education & Reference
How a black hole is formed ?
I would like to know how a black hole can possibly be formed .
Are there any experimental evidence of such creation ?
The current scientific theory holds that black holes are formed when stars of sufficient mass ( about 3x the mass of our Sun ) reach the end of their life and collapse
It is also thought that black holes can be formed from smaller masses if external energy / pressure is exerted to squeeze the mass into a singularity .
Not sure if there 's any direct experimental evidence of creation , but there is evidence that they exist .
use several different methods to detect blacks holes , such as by looking for light being bent and/or disappearing as it travels from remote stars towards us , and also by
Fun fact : current evidence and theory suggests that the center of the Milky Way is a giant black hole that was formed as the packed stars in the center collapsed
label: Science & Mathematics
predict: Science & Mathematics