An American professor who won the Nobel Prize for co-discovering the structure of DNA is drawing criticism for claiming black people are less intelligent than whites. Dr. James Watson was set to deliver a speech at the London Science Museum in Britain. But the appearance was canceled after Watson’s response to a question on Africa’s long-term future was published in a British newspaper. Watson said: “All our social policies are based on the fact that their intelligence is the same as ours — whereas all the testing says not really.” Watson’s research lab, the Cold Spring Harbor Laboratory, has suspended him over his comments.