Dinosaur Discs

["Peter Von Sholly" <vonrex@gte.net>]

While looking at the Apatosaurus skeleton at Yale Peabody, I noticed that
all the verterbrae seemed butted directly up against each other, leaving no
room at all for cartiligenous (sp?) discs in between.  Did dinosaurs had
them?  If so, might they not possibly have had, over the length of a large
animal, a significant bearing on length of said animal?  Or are discs
really only present to the degree we see them in human spines in erect
animals that battle gravity and have a lot of flexion?  Just wondering
about that.