could someone point me to a bsp collision tutorial?

If you are "advanced" in programming, any tutorial relating to bsp trees such as those from gamedev.net, flipcode.com, or gamasutra.com could suit your needs. If you are like me, you are not ready for such a feet and are waiting for the quake3 bsp file loading tutorial from gametutorials.com (should be within the next couple weeks)

"Agassiz insists that ancient animals resemble to a certain extent the embryos of recent animals of the same classes; or that the geological succession of extinct forms is in some degree parallel to the embryological development of recent forms."