To attempt to answer JB's post, those various types of human skulls must be variations of, and offshoots of, God's own. And my reasoning makes me think that if we are of God's image, then our development must mirror his as well - gills, tail, and all.
Of course, it almost sounds as if God was a man much like us, but who was blessed with the technology and resources to create our universe, and colonize it, at least the infinitesimal portion of it which is earth, with another of his creations - us.
__________________ 1992 Deep Emerald Green Mustang GT Hatch, 5 speed, 2.73s, Mac fenderwell cold air intake, '93 Cobra MAF, Mac 70mm throttle body & spacer, Explorer intakes, Mac unequal headers & offroad pipe, Magnaflow catback, Walbro 110lph fuel pump, Jet adjustable FPR, MSD Blaster coil, Accel 8mm wires, FRPP aluminum quadrant, UPR firewall adjuster, stock cable, Granatelli upper control arms.
Waiting to go on: Granatelli lower control arms, and GT40 Iron heads! | 
