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When I was researching family history and learning about genes a while back, I learned something pretty interesting. Apparently all modern humans can be traced back to a very small group of people in Africa. Out of that group, only a small number of them actually spread out and multiplied across the world - a tiny gene pool!

When scientists studied the human genome after it was fully mapped, they found that there is much more genetic diversity in a single colony of chimpanzees that the two most unrelated people on Earth. Let that sink in! You and a pygmy person on the other side of the earth are more genetically similar than two chimps that grew up in the same jungle.

It isn't surprising that we have so many diseases and other problems; crooked teeth included...

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