I was looking for clues from the vegetation but they never brought it up.

The species they highlighted all seemed to be close relatives of some of the familiar dinosaurs...raptors, horned dinosaurs, T-Rex cousins etc. They didn't seem to feature any cold-weather adaptations in the fossils.

One specimen they used as evidence was a small raptor's fossil which seems to have died in its den while "hibernating", but it was only one isolated example.

All in all, I was disappointed by the quality of science for a "Nova". But the field scientists involved in the study all seem to have accepted the conclusions I'm skeptical about.

Thanks for the research. I appreciate it.