1. What do you think? The available evidence is stillspeculative. There is no clear cut proofthat dinosaurs were either cold-bloodedor warm-blooded, except that dinosaursevolved endothermy some time in theirhistory, as documented by living birds.

2. Practical Exercise 1.What is the biggest possible size a dinosaur could be? 3. Were Dinosaurs Warm-Blooded? 4. Warm-blooded versus Cold-blooded? Ectothermic (cold-blooded) Relies on external heat Endothermic (warm-blooded) Relies on internal heat 5. Warm-Blooded Dinosaur Theory? ???cc. Arno / Coen Above: Thermal image showing the difference between an ectothermic snake (black/ blue) that is eating an endothermic mouse (red/ yellow). 6. Evidence for Warm-BloodedDinosaurs Bone structure and Histology 7. Evidence for Warm-BloodedDinosaurs Dinosaur behaviour Features such as long legs suggest fast running. John Conway 8. Evidence for Warm-Blooded Dinosaurs Predator to prey ratios 9. Evidence for Warm-BloodedDinosaurs Arctic dinosaurs 10. Dinosaurs Summary Dominated the Earthfor 160 million years They lived on allcontinents Include the biggestland animals EVER! Stopped themammals fromevolving