The statement says that “evolution is a vital, well-supported, unifying principle of the biological sciences.” Did you forget that it is vital to the geological sciences too?
Regrettably, we did. Unfortunately, by the time that Steve Semken pointed out our mistake, the statement was so widely circulated that it would have been difficult to rectify it. For the record, then, NCSE’s position is that evolution is vital to the geological sciences too; we confidently expect that the signatories would agree if asked, but we unfortunately failed to ask.