I was just saying the same thing. I've thought for some time now, that Earth's gravity had to have been weaker in that time, or the planet itself had to be smaller to support such gigantic beasts.
Those are heretical thoughts, I know, but nothing else makes sense to me.
Think you're like me Flier, I find scientific anomalies that don't agree with standard thinking to be the most interesting things in science, be it in paleontology, physics, astronomy or archeology.
Things that make "The experts" scratch their heads or run away from :)