Cold-adapted dinosaurs?

Paleontologists studying 115-million-year-old dinosaur tracks in Australia report the tracks are evidence that dinosaurs flourished in a period where temperatures ranged from 20 degrees Centigrade (68F) in the summer to a chilling -30C (-22F) in winter. Paleontologist Thomas Rich speculates the species which left the tracks, a carnivore standing about four meters high, may have been a truly warm-blooded species equipped with body fat to ward off the cold. This find reminds us about how much we still have to learn about the most fascinating creatures ever to walk the Earth.