>>8
There are thousand of studies of racial differences, mostly in peer-reviewed journals...
http://www.ssc.uwo.ca/psychology/faculty/rushtonpdfs/Race_Evolution_Behavior.pdf
This sums up a few of the literature, though it contains several errors, most notably regarding penis size and testosterone (Blacks biologically live less -- as in die of old age sooner -- than Whites, testosterone differs with age, so the comparisons in almost every study made so far are bunk... though the general conclusion, that Blacks have higher testosterone levels is true).
About Blacks being physically stronger, there are several books about that too, just google them.
>>10
I work in medicine and race is very relevant here, despite stupid libfags' attempts to obfuscate it and even though race denial is hurting minorities more than anything because 'We're all equal lol' translates to minorities being, as is well-known, less likely to participate in biomedical research. Libfags really think the world is one big Disneyland ride...
Now that race can be genetically determined with 100% accuracy, there is absolutely no reason to not use it.