Race and Intelligence Science's Last Taboo

It's been the subject of controversy ever since IQ tests were invented. In 2007 Nobel prize winner James Watson (one half of the team who unravelled DNA) became the latest eminent scientist (all of them white) to cause a furore when he suggested research proved black people were less intelligent.

Meanwhile, right wing websites hailed him as the new Galileo - a martyr to political correctness that was concealing the fact that there is indeed evidence that shows different races score differently in IQ tests. But are the tests biased? Is race really a scientific category at all?
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