re: How do you explain the origin of the various human races scientifically?

Man, go pick up a book, and stop making dumb threads.

quote:

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How do you explain the origin of the various human races scientifically?
Educate me, smartass!

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there is no end goal in evolution, the different races of humans evolved from mutations over dozens of generations within an isolated population that (and here is what 'survival of the fittest' actually means) allowed members withing those populations to 'fit' better in their niche in response to selective (read environmental) pressures and pass on those acquired mutations at higher rates.

humans are intelligent animals able to extract every resource from a niche therefore we havent reached a point in our evolution that would force an evolutionary advantage to one race, because we grow food, we build shelters and clothing, we use medicine....

we dont have forcing naturally selective pressures on our populations any longer, in other words we 'fit' at this moment in time nicely. So what you are looking for and would think of as some singled out advantageous mutation is diluted within the genome