A greenhorn on the ranch

A greenhorn on the ranch (Guardian: 01-Apr-04)
…Who knows why [President George W Bush has] taken to beating up on scientists of every description, not just on global warming but on points that have been long settled. On evolution, for instance, he believes "the jury is still out," as he said in the last presidential campaign. Charles Darwin is damn near pre-deluvian himself, at least in the Christeo-Bush Calendar, the one that believes time began six thousand years before the birth of Mel Gibson. Besides, he wasn't even a Democrat.
Pre-deluvian? I thought the word was antediluvian. Me, I'm anti-diluvian.