A bill that encourages classroom debate over evolution will become law in Tennessee, despite a veto campaign mounted by scientists and civil libertarians who say it will reopen a decades-old controversy over teaching creationism to the state’s schoolchildren.

Gov. Bill Haslam said Tuesday that he will allow House Bill 368/Senate Bill 893 to become law without his signature, a symbolic move that signals his opposition but allows the measure to be added to the state code.

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