Dinosaurs Are Endotherms

In the lecture, the lecturer casts doubt on the idea that dinosaurs could have been endotherms, which is supported in the reading passage.

For one thing, the author of the reading passage states that dinosaur fossils have been found even in polar regions. This shows that dinosaurs might have been able to regulate their body temperature. However, the lecturer contradicts this point by arguing that polar regions when dinosaurs existed were much warmer than today, and when the regions were ice-cold during winter, dinosaurs might have been able to migrate to warmer areas or hibernate like modern reptiles. Therefore, the presence of dinosaur fossils in polar regions does not prove that dinosaurs were endotherms.

Second of all, the author makes