Question of the Week

Scientifically, the film with the best theme tune is:

See Results

Geek of the week

Nominate someone...

Nominate a Geek. Email news@null-


By Logan Wright

Yawning is usually seen as indicative of tiredness or boredom, but people have been known to yawn in other situations. Anaerobic athletes such as weightlifters or sprinters sometimes notice themselves yawning during intense workouts or competitions. Yawning, which is not limited to humans, is also inexplicably contagious. If someone near you yawns, there is a good chance you’ll join them soon.

One hypothetical function for yawning relates to an accumulation of carbon dioxide. This makes some sense at first, but upon closer inspection, it fails to explain all yawning. For example, why should it be so damned contagious?

More information: Can you catch a yawn?

Back to Top Ten Things Science Hasn't Explained

Return to the top »

Share this

Bookmark this article at Digg Bookmark this article at Bookmark this article at Slashdot Bookmark this article at StumbleUpon Email this article to a friend



Most Read Articles

    Database Exception (1194)

    Unable to perform query:

    SELECT * FROM article_count group by page_id ORDER BY counter DESC LIMIT 5

    Table 'article_count' is marked as crashed and should be repaired