www.sciencefacts.info wrote:
Different regions on earth have different natural selection pressures.
Over time, different natural selection pressures will select for different physical and mental traits.
The semantics of the word "race" can be argued until you are blue in the face, but you can't argue with scientific facts.
That would be true, if impenetrable walls existed but it never did. The HGP proved by crunching DNA on Unix Superservers that tribes of people continuously mixed with nearby tribes, far away tribes, and distant tribes from across the oceans and continents, millions of times since the birth of the human race in Kenya 60K-100K years ago. The evidence and findings are published on the web and available to for review. There are internet forums, public conferences, and professors/reserachers at thousands of universities whom you can call, email, tweet, or blog to argue and dispute these facts. If you can disprove the findings of the HGP they surely want to hear from you.