FOX NEWS: Tiny knee bone three times more prevalent than 100 years ago: study
Tiny knee bone three times more prevalent than 100 years ago: study
![](https://static.foxnews.com/foxnews.com/content/uploads/2018/09/73fb2638-arthritis_pain_knee_640.jpg)
A small bone behind the knee that scientists previously thought had been selected out by evolution a century ago is now three times more prevalent - and possibly linked to arthritis, according to a new study.
via FOX NEWS https://fxn.ws/2VTJ14h
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