Aliens or Darwin?

I heard a really weird statistic today, only forty per cent of Americans believe in the Theory of Evolution, but over sixty per cent believe space aliens have visited the Earth!

Now I happen to believe in the former and although I would be surprised if they didn't exist, I haven't seen solid evidence that alien life has visited Earth. Maybe it's because Earth is not the kind of neighborhood you would care to be seen in.

I just wonder what this says about the people's trust in science in the U.S.?

We believe more in a concept for which there is no evidence, than we do in one which has?