Thanks for the link Nosfer.  Very interesting article.  Certainly sounds like the tank comparison is a good one.  A raptor couldn't even scratch the surface?  Funny thing is when I looked at the picture I couldn't figure out what it reminded me of and then the reference to a bird's beak and turtle shell comparison hit the spot.

I've always been fascinated with dinosaurs and was very interested in one of the links to the right of the article about the claims of researchers that one-third of them probably never existed.

Thanks again.