Tuesday, May 29, 2007

Useless appendages

Here is a funny compilation of vestigial structures that are totally useless. One of them caught my eye (I swear it's not the male nipple): "With all of the pain, time, and money that are put into dealing with wisdom teeth, humans have become just a little more than tired of these remnants from their large jawed ancestors. But regardless of how much they are despised, the wisdom teeth remain, and force their way into mouths regardless of the pain inflicted. There are two possible reasons why the wisdom teeth have become vestigial. The first is that the human jaw has become smaller than its ancestors' and the wisdom teeth are trying to grow into a jaw that is much too small. The second reason may have to do with dental hygiene. A few thousand years ago, it might be common for an 18 year old man to have lost several, probably most, of his teeth, and the incoming wisdom teeth would prove useful. Now that humans brush their teeth twice a day, it's possible to keep one's teeth for a lifetime. The drawback is that the wisdom teeth still want to come in, and when they do, they usually need to be extracted to prevent any serious pain."


7 comments:

Anonymous said...
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rob said...

Does that mean that because I still have my wisdom teeth I'm more primitive! EAT MY TAIL!!!

Anonymous said...

Humans brush twice a day??!

Anonymous Coward said...

new study finds 12 percent of Brits never brush their teeth

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dude I cannot watch the images, the page show me that the images has been removed from the post, well maybe the next time you can upload again.

Edward Son said...

The whole idea of wisdom teeth is a strong bit of evidence for the continued adaptation of humans to their environment. wisdom tooth extraction