Larni writes:
I have often wondered 'who would win' if dinosaurs were somehow pulled from the past and I think I concluded that the dinosaurs would 'win' in the short term but laying eggs on land would be the death of them.
It's a favourite hypothesis of mine that the dinosaurs were under pressure from smart mammals for exactly that reason before the K-T event, and their days were perhaps numbered. Hence the survival of those which could lay their eggs out of reach.
I'm sure that the idea must have been suggested before.
As for speculation on a world with T-Rex and buffaloes, we need some answers from YEC's. T-Rex is, I think, found only in North America, which must have been very crowded in between the creation and the flood!