In 2007, Nobel Prize-winner James Watson caused controversy when he was quoted referring to research that suggests black people are less intelligent than other races. Rageh Omaar finds out whether there is any truth to those claims, meeting scientists who believe the research supports the view that races can be differentiated as well as those who oppose the idea. Part of the Race: Science's Last Taboo season.
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Ready to Watch Channel 4 UK Documentaries, Season 2009, Episode 12?