Evolutionary origins of our pretty smile

It takes both teeth and jaws to make a pretty smile, but the evolutionary origins of these parts of our anatomy have only just been discovered, thanks to a particle accelerator and a long dead fish.

Source: http://feeds.sciencedaily.com/~r/sciencedaily/health_medicine/dentistry/~3/zukcJzU6Ezw/121017131834.htm

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