a large part of this is because whites have 2 genes that in one case virtually no one else has to nearly the same extent and in the other its only found a large amount in native americans.  the first is a gene which makes neurons produce more synaptic connections plus it makes the brain a little bigger. the effect this has is that the person with this gene is more creative and learns faster. the other gene that we share with na is associated with greater curiosity.
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