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What do you think?• The available evidence is still  speculative. There is no clear cut proof  that dinosaurs were either ...
Practical Exercise 1.What is the biggest possible size a       dinosaur could be?
Were Dinosaurs Warm-Blooded?
Warm-blooded versus Cold-blooded?• Ectothermic (cold-blooded)  – Relies on external heat• Endothermic (warm-blooded)  – Re...
Warm-Blooded Dinosaur Theory? ??      ?                                      cc. Arno / Coen           Above: Thermal imag...
Evidence for Warm-Blooded        Dinosaurs…• Bone structure and Histology
Evidence for Warm-Blooded        Dinosaurs…• Dinosaur behaviour                       Features such                       ...
Evidence for Warm-Blooded       Dinosaurs…          • Predator to prey ratios
Evidence for Warm-Blooded        Dinosaurs…• Arctic dinosaurs
Dinosaurs Summary          • Dominated the Earth            for 160 million years          • They lived on all            ...
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Dinosaurs2a

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Dinosaurs2a

  1. 1. What do you think?• The available evidence is still speculative. There is no clear cut proof that dinosaurs were either cold-blooded or warm-blooded, except that dinosaurs evolved endothermy some time in their history, as documented by living birds.
  2. 2. Practical Exercise 1.What is the biggest possible size a dinosaur could be?
  3. 3. Were Dinosaurs Warm-Blooded?
  4. 4. Warm-blooded versus Cold-blooded?• Ectothermic (cold-blooded) – Relies on external heat• Endothermic (warm-blooded) – Relies on internal heat
  5. 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. 6. Evidence for Warm-Blooded Dinosaurs…• Bone structure and Histology
  7. 7. Evidence for Warm-Blooded Dinosaurs…• Dinosaur behaviour Features such as long legs suggest fast running. John Conway
  8. 8. Evidence for Warm-Blooded Dinosaurs… • Predator to prey ratios
  9. 9. Evidence for Warm-Blooded Dinosaurs…• Arctic dinosaurs
  10. 10. Dinosaurs Summary • Dominated the Earth for 160 million years • They lived on all continents • Include the biggest land animals EVER! • Stopped the mammals from evolving

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