I'm currently reading "Did Adam and Eve Have Navels?" by Martin Gardiner, which mentions the infighting among creationists. I was surprised to learn that Newton decided the Earth was even younger than Bishop Usher's 4004 BC! Sometimes I wonder if the Young Earthers, like Erik Von Daniken (spelling?) simply have a problem accepting that everything we call civilized was invented by dark-skinned people.
The Catholic notion that man did descend from primates, but that at some point God plugged in a soul, is just lame.