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Ask Yahoo中有许多奇奇怪怪的问题，奇怪的是这些奇怪的问题竟然都能得到严肃的回答. :)

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最近最热门的一个问题是:

If one person yawns, why does everyone else in the room want to yawn?

(为什么一个人打哈欠，房间内的其他人也都想打哈欠？)

问题的回答：

引文：

Dear Yahoo!: If one person yawns, why does everyone else in the room want to yawn? Lynn
Garland, Texas Dear Lynn: 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 gaping maws 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 holdover 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 wouldn't blame them for falling asleep at the wheel. In the meantime, give the "yawn challenge" a try -- it's tougher than it looks.

最热门的问题：

引文：

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1. If one person yawns, why does everyone else in the room want to yawn?
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In Computers & Internet
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10. What's the difference between a prince and a crown prince?
In Cultures & Groups
Sent: 11

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