I don’t buy it. There are skeletons of juvenile Triceratops. Perhaps Torosaurus is a variation, but I can’t see it as a more mature form of the already huge Triceratops. More likely, this is a case of divergence, as with the Indian and African Elephant.
They do make a good case for the holes in the frill, stating that the bone type for the frill is of a kind that can and does change shape over time, and can both grow and shrink. However, There are far too many examples of both animals to conclusively lump them together.
Granted, I’m not a paleontologist, so I don’t have all the science the way Horner does, but this may be a case of being unable to see the forest because of all the trees in the way.
Yep...thanks for ruining my childhood...freepers...tri-c was my favorite...now what I’m going to tell my 4 year old nephew who loved trc-c too?
Ya gotta admit, it’s amusing that the scientist’s name is “Horner”.