[Oblongata]

"Some people have 4 wisdom teeth, some have less than 4, and some have none at all...is that evolution at work?...since wisdom teeth are not necessary for human beings, and more often than not, they are just a pain, become impacted and have to be removed by a dentist, doesnt understanding evolution explain the decline in people having wisdom teeth?...we dont need them, so eventually the human race will no longer have them..."

Just because wisdom teeth are unneccesary does not mean they disappear from the gene pool. There has to be some factor that makes people without wisdom teeth more likely to reproduce. Possibly it is infection rates from impacted wisdom teeth. 1000 years ago if 25% of people who had infected wisdom teeth died of infection, that would impact the gene pool. Today it is not as likely, but it is still more likely that someone with infected wisdom would die than someone without wisdom teeth. Therefor it still impacts the gene pool, only slightly.

[andysandmikesmom]

Thanks for your explanation...it makes sense...

[ValerieUSA]

1000 years ago if 25% of people who had infected wisdom teeth died of infection, that would impact the gene pool.

Very punny.