Prof. Henry Harpending, author of the study conducted at the University of Utah in Salt Lake City and published in the Proceedings of the National Academy of Sciences (PNAS), said "Genes are evolving fast in Europe, Asia and Africa, but almost all of these are unique to their continent of origin. We are getting less alike, not merging into a single, mixed humanity." The professor said this is happening because there has not been much "flow" between different regions since humans first left Africa for the rest of the world.
The researchers provided two theories for why evolution is speeding up:
- There are more people, meaning advantageous mutations have more chance to appear
- Environmental and dietary changes
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