Steve Paulson of Salon.com has an interview with Ronald Numbers. In it, he points out something not well known, I don't think:

There's a stereotype that creationists just aren't that smart. I mean, how can you ignore the steady accumulation of scientific evidence for evolution? Is this a question of intelligence or education?

Not fundamentally. There is a slight skewing of anti-evolutionists toward lower levels of education. But it's not huge. One recent poll showed that a quarter of college graduates in America reject evolution. So it's not education itself that's doing this. There are really dumb creationists and there are really dumb evolutionists. Of the 10 founders of the Creation Research Society, five of them earned doctorates in the biological sciences from major universities. Another had a Ph.D. from Berkeley in biochemistry. Another had a Ph.D. from the University of Minnesota. These were not dumb, uneducated people. They rejected evolution for religious and, they would say, scientific reasons.

If you haven't read Numbers' book, The Creationists, I would highly recommend it. Its disappointing that he has not been able to reconcile his belief with his science.