Does tenure protection extend to professors saying that evolution is false in class? So I'm dealing with a very weird case here. I'm a PhD student and my wife is currently taking a history course at a different university. Apparently this instructor says he has tenure so no one can do anything about his rambling.

He spends a sizable chunk of the course ranting about how evolution is false because there's no proof of it, that Neanderthals didn't exist, and how humans aren't apes. He also claimed the Earth isn't 4 billion years old and people lived with dinosaurs.

This is obviously very obnoxious and disturbing to sit through. But is it true that his rambling is protected by tenure? If we were to complain could anything be done? Thanks.
Having tenure doesn't mean a professor can spend large amounts of time in a course talking about off-topic things. They still have a duty to teach the subject of the course.

Have your wife talk to the department chair if she feels she isn't receiving the education that she expects from the course.