[decimon]

Actually less massive dinosaurs makes the most sense.

It does to me. With less mass they are more agile and need less food to maintain their mass.

[Paradox]

Agreed about the lighter Dino’s. This solves a few conundrums in paleontology about bone size (tail bones and femurs). They just couldn’t seem to get things to add up correctly. It will be interesting to see if this pans out.