High school and college students who understand the geological age of the Earth (4.5 billion years) are much more likely to understand and accept human evolution, according to a University of Minnesota study published in the March issue of the journal Evolution.
In other words, students who can accept the earth is older than their parents, can also accept evolution. But it goes on to say that only 1 in 4 high school teachers put out students who can do this. So, most of the US can no longer produce doctors.
It's ok, I think they can import them from elsewhere, as long as they like guns. :)