Another reason not to flee to the suburbs

Just being around folks of different races makes them seem less "other" -- from infants on up. Some scientists have argued that such "tribal" biases are innate, but this evidence supports the (really, more logical) explanation that we learn to define what's normal by what we spend time with. Fight on, crazy liberal multiculturalists! Perhaps some day nobody will understand what a test like this one was intended to reveal...